Updated on 2024/05/19

写真a

 
MATSUOKA Shiro
 
Organization
Academic Assembly Institute of Science and Technology CHIKYU SEIBUTSU KAGAKU KEIRETU Professor
Graduate School of Science and Technology Environmental Science and Technology Professor
Faculty of Science Department of Science Professor
Title
Professor
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Degree

  • 博士(理学) ( 1998.2   九州大学 )

Research Areas

  • Nanotechnology/Materials / Analytical chemistry

Research History (researchmap)

  • Niigata University   Faculty of Science Department of Science   Professor

    2017.4

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  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology   Professor

    2012.4

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  • Niigata University   Faculty of Science Department of Environmental Science   Professor

    2012.4 - 2017.3

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  • Niigata University   Faculty of Science Department of Environmental Science   Associate Professor

    2004.4 - 2012.3

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  • 九州大学高等教育総合開発研究センター   助手

    2003.4 - 2004.3

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  • 米国ユタ大学医学部麻酔科(VAメディカルセンター)   研究員

    2001.4 - 2002.3

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  • 九州大学大学教育研究センター   助手

    1999.4 - 2003.3

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  • 九州大学大学院理学研究科   助手

    1994.4 - 1999.3

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  • 九州大学教養部化学教室   助手

    1989.4 - 1994.3

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Research History

  • Niigata University   Faculty of Science Department of Science   Professor

    2017.4

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology   Professor

    2012.4

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology   Professor

    2012.4

  • Niigata University   Faculty of Science Department of Environmental Science   Professor

    2012.4 - 2017.3

  • Niigata University   Faculty of Science Department of Environmental Science   Associate Professor

    2004.4 - 2012.3

Education

  • Kyushu University   Faculty of Science   化学科

    - 1988.3

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    Country: Japan

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Professional Memberships

  • The Japan Society for Analytical Chemistry

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  • The Chemical Society of Japan

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Papers

  • 浄水過程における PAC(ポリ塩化アルミニウム)の 凝集に及ぼすイオン状シリカの影響 Reviewed

    広城吉成, 森山 晃, 井辺弘貴, 重松 藍, 松岡史郎

    水道協会雑誌   87 ( 10 )   11 - 16   2018.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • Interaction of borate and phenylboronate with the cross-linked dextran gel matrix Reviewed

    Yoshinobu Miyazaki, Shiro Matsuoka, Kei Asada, Yuma Kawasaki, Kazuhisa Yoshimura

    Polyhedron   151   233 - 242   2018.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier Ltd  

    The interaction of borate and phenylboronate with dextran gels having different degrees of cross-linking was investigated to clarify the structures of the adsorbed boron species, binding sites of the gel matrix, and the adsorption properties. The main adsorbed species of the phenylboronate was the five-membered mono-chelate complex. In addition to this, the five-membered bis-chelate complex, and the five- and six-membered bis-chelate complex were also the main species for the borate. The boron adsorption was not produced by the glucopyranoside units that were the major constituents of the dextran gel, but by the gluconate residues and various forms of the glycerol residues, which had been generated during the cross-linking process of the dextran. The adsorption behavior was reproduced by the calculation taking the complexation of boron with the gel matrix and the Gibbs–Donnan relation into consideration.

    DOI: 10.1016/j.poly.2018.05.051

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  • Coordination properties of aqueous vanadate complexes with nitrogen- and oxygen-containing multidentate ligands Reviewed

    Yoshinobu Miyazaki, Shiro Matsuoka, Takao Fujimori, Yoshitaka Kai, Kazuhisa Yoshimura

    POLYHEDRON   134   79 - 87   2017.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    The complexation properties of aqueous vanadate with diethanolamine (DEA) and iminodiacetate (IDA) derivatives were elucidated by NMR spectroscopy and DFT calculations. The coordination geometries of vanadium in 1:1 complexes of the DEA derivatives were confirmed to be trigonal-bipyramidal with a tridentate binding mode. The trigonal-bipyramidal complexes of N,N-bis(2-hydroxyethyl)glycinate (Bicine) and N-(2-hydroxyethyl)iminodiacetate (HIDA) binding through the nitrogen atom, hydroxyethyl and carboxymethyl groups, were also formed at lower and higher pHs, respectively. Vanadate binds with IDA through the nitrogen atom and one of two carboxymethyl groups to form a trigonal-bipyramidal complex, in addition to the trigonal-bipyramidal complex binding through the nitrogen atom and both of the carboxymethyl groups. The latter five-coordinate complex has an open space suitable for additional coordination at the apical position of the central vanadium, which is the same side of the hydrogen atom on the coordinating nitrogen. When an appropriate functional group, such as a carboxymethyl group, acetamido group or hydroxyethyl group, exists instead of the hydrogen atom on the nitrogen, these groups can coordinate to the central vanadium to form a highly stable octahedral complex with a tetradentate binding mode. These findings made it possible to provide an integrated and comprehensive interpretation about the complexation properties of the aqueous vanadate. (c) 2017 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.poly.2017.05.056

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  • Speciation of dissolved chromium and the mechanisms controlling its concentration in natural water Reviewed

    Sulistyo Saputro, Kazuhisa Yoshimura, Shiro Matsuoka, Ko Takehara, Narsito, Jun Aizawa, Yoshika Tennichi

    CHEMICAL GEOLOGY   364   33 - 41   2014.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    The circulation of chromiumat naturally occurring concentration levels (i.e., 1 mu g dm(-3) or lower) was examined using solid-phase spectrophotometry and inductively coupled plasma-mass spectrophotometry (ICP-MS) to determine the Cr(VI) and Cr(Total) concentrations, respectively. Natural water and stream sediments were collected from areas with various types of geologic features, such as metamorphic rocks, volcanic rocks and limestone in Japan and Indonesia. Cr(VI) was predominant in weakly alkaline natural waters, and the Cr(III) concentrationwas less than 1 mu g dm(-3), whichwas considerably lower than that expected based on the solubility of Cr(OH)(3). The dissolution of chromium in natural water was described by the leaching of Cr(VI) from Cr(III)containing minerals under oxic conditions. The Cr(VI) concentration in a solution that was in contact with chromite, FeCr2O4, linearly increased with the reaction time. The results indicated that under oxic conditions at P-O2 = 0.21 atm, the leaching rate of Cr(VI) was pseudo zero-order at a fixed pH and was higher in alkaline than in acidic solutions. The removal of Cr from natural waters was due to the reduction of Cr(VI) to Cr(III) by organic matter, such as humic substances, as well as to the adsorption of Cr(III) onto suspended matter and river sediments. The reduction of Cr(VI) to Cr(III) followed the equation -d[Cr(VI)]/dt = [H+](a)[ Cr(VI)][DOC] with a = 0 at pH b 4 and a = -1 at pH N 4.5. The removal of Cr(III) by river sediments and/or suspended particulate matter was rapid and the adsorbability of Cr(III) was dependent on pH, which suggests that the active species were Cr(OH)(2)(+) and Cr(OH)(3). Schematic models of the circulation of dissolved chromium in natural water were proposed under acidic and alkaline conditions. (C) 2013 Elsevier B. V. All rights reserved.

    DOI: 10.1016/j.chemgeo.2013.11.024

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  • Mineralogical and geomicrobial examination of soil contamination by radioactive Cs due to 2011 Fukushima Daiichi Nuclear Power Plant accident Reviewed

    Junji Akai, Nao Nomura, Shin Matsushita, Hisaaki Kudo, Haruo Fukuhara, Shiro Matsuoka, Jinko Matsumoto

    PHYSICS AND CHEMISTRY OF THE EARTH   58-60   57 - 67   2013

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    Soil contamination by radioactive Cs from Fukushima Daiichi Nuclear Power Plant accident was investigated. Absorption and desorption experiments of Cs were conducted for several phyllosillicates (kaolinite, sericite, montmorillonite, vermiculite, chrysotile and biotite), zeolite and solid organic matter (dead and green leaves). The results confirmed the characteristic sorption and desorption of Cs by these materials. The 2:1 type phyllosilicate, especially, vermiculite and montmorillonite absorbed Cs well. Heated vermiculite for agricultural use and weathered montmorillonite also adsorbed Cs. Leaves also absorbed Cs considerably but easily desorbed it. In summary, the relative capacity and strength of different materials for sorption of Cs followed the order: zeolite (clinoptilolite) > 2:1 type clay mineral > 1:1 type clay mineral > dead and green leaves. Culture experiments using bacteria of both naturally living on dead leaves in litate village, Fukushima Pref. and bacterial strains of Bacillus subtillis, Rhodococus erythropolis, Streptomyces aomiensis and Actinomycetospora chlora were carried out. Non-radioactive 1% Cs solution (CsCl) was added to the culture media. Two types of strong or considerable bacterial uptakes of Cs were found in bacterial cells. One is that Cs was contained mainly as globules inside bacteria and the other is that Cs was absorbed in the whole bacterial cells. The globules consisted mainly of Cs and P. Based on all these results, future diffusion and re-circulation behavior of Cs in the surface environment was discussed. (C) 2013 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.pce.2013.04.010

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  • Solid-phase spectrophotometry for on-site analysis of trace elements in natural water Reviewed

    Sarenqiqige, Sulistyo Saputro, Satsuki Kai, Makoto Satoda, Shiro Matsuoka, Kazuhisa Yoshimura

    Analytical Sciences   29 ( 6 )   677 - 680   2013

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    A new, simple and sensitive solid-phase spectrometry (SPS) that is easily applicable to the on-site analysis of targeted chemical components in water at μg dm-3 or sub-μg dm-3 levels is proposed in this study. The main features of the SPS are the simplicity of operation, high sensitivity and applicability to real samples without the need for any pretreatment procedures. A portable spectrophotometer, consisting of an LED light source, a grating and a CCD, was used for the solid-phase light measurements. The universal applicability of the proposed system to on-site analysis was evaluated by determining phosphate, chromium(VI) and iron(II) in natural water. © 2013 The Japan Society for Analytical Chemistry.

    DOI: 10.2116/analsci.29.677

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  • Development and Validation of a Sensitive and Fast Solid-phase Spectrophotometric Procedure for Phenol Determination in Pharmaceuticals Reviewed

    Jadranka Vukovic, Shiro Matsuoka, Kazuhisa Yoshimura, Renata Jurisic Grubesic, Dario Kremer, Natasa Santic

    ANALYTICAL SCIENCES   28 ( 4 )   397 - 402   2012.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:JAPAN SOC ANALYTICAL CHEMISTRY  

    A very sensitive, simple, and fast solid-phase spectrophotometric procedure for the determination of phenol using the p-nitrobenzenediazonium reagent (DAR reagent) was developed. This procedure is based on the simultaneous concentration of the orange product on a Dowex 1-X2 anion exchanger within 15 min, and a direct absorbance measurement of the sorbed species at both 530 nm (the absorption maximum of the phenol-DAR in the resin phase) and 700 nm (the range where only the resin absorbs light). Quality control and evaluation of the analytical parameters was carried out using a comprehensive prevalidation strategy. The linearity of the method was confirmed within an analyte working range from 0.01 to 0.10 mu mol (0.2 to 2.0 nmol mL(-1)). The precision ranged from +/- 1.17 to +/- 9.61%; the accuracy ranged from -17.50 to +17.81%. The evaluated limiting values were L-D = 0.0013 mu mol and L-Q = 0.0082 mu mol. The DAR-SPS method was successfully applied to the determination of phenol in a pharmaceutical sample of salicylic acid (98.0 - 100.0%) and vaccines (98.0 - 103.4%).

    DOI: 10.2116/analsci.28.397

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  • Simple spectrophotometer for solid phase spectrometry applicable to on-site analysis of phosphate in natural water Reviewed

    Sarenqiqige, M. Koga, M. Satoda, S. Matsuoka, K. Yoshimura

    Kyushu University Global-COE “Science for Future Molecular Systems” Journal   ( 5 )   106 - 109   2012.3

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  • Acidic Polyol-Boric Acid Complex Chemistry and Its Application to Boron Analysis Reviewed

    Chaoying Shao, Yoshinobu Miyazaki, Shiro Matsuoka, Ko Takehara, Takao Fujimori, Kazuhisa Yoshimura

    BUNSEKI KAGAKU   61 ( 3 )   177 - 184   2012.3

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:JAPAN SOC ANALYTICAL CHEMISTRY  

    B-11 NMR measurements showed that boric acid reacts with the polyol compounds, chromotropic acid, Tiron and 2,3-dihydroxynaphthalene-6-sulfonate, to form complexes with 1 : 1 and 1 : 2 stoichiometries. The equilibria of the complexation depend on the pH in the solution. The 1 : 2 complex is formed in an acidic or a neutral solution, while the 1 : 1 complex occurs in a higher pH range. Kinetic studies revealed that the reaction of 1 : 1 complex formation is much faster than that of 1 : 2 complex formation. A proton catalyzes both the reactions of 1 : 2 complex formation and its decomposition. On the basis of equilibrium and kinetic information, a novel method of on-line absorptiometric determination for trace amounts of boron was developed using a chromotropic acid presorbed anion-exchange column. On-line reaction and separation were achieved by controlling the pH conditions in solutions to accelerate 1 : 2 complex formation in the concentration process at pH 3 and to stabilize the complex in the separation process at pH 8. The 1 : 2 complex was satisfactorily separated from excess free ligand and matrix components by changing the concentration of NaClO4 in the eluent; its peak height on a chromatogram monitored at 350 nm was used for boron determination. The sensitivity could be enhanced by increasing the sample amount introduced, and the detection limit (3 sigma) was 0.05 mu g dm(-3) of boron when 13.4 cm(3) of the sample was used. The method has been successfully applied to the determination of trace boron in river water, ion-exchanged water and steels. Based on the electrochemical activities of respective species in the boron-chromotropic acid and boron-Tiron systems, methods for monitoring the boron concentration in RO desalination processes were also proposed.

    DOI: 10.2116/bunsekikagaku.61.177

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  • Selective Determination of Trace Iron in Different Oxidation States in Natural Water by Flow Injection-Solid Phase Spectrometry Reviewed

    Shiro Matsuoka, Yoshika Tennichi, Takashi Ito, Kosuke Hori, Kazuhisa Yoshimura

    ANALYTICAL SCIENCES   28 ( 3 )   225 - 230   2012.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:JAPAN SOC ANALYTICAL CHEMISTRY  

    A novel method for the selective determination of Fe(II) and Fe(III) in water using 2-nitroso-5-[N-n-propyl-N-(3-sulfopropyl)amino]phenol (PSAP) was developed. QAE-Sephadex anion exchanger packed in a flow-through cell was used as a medium not only for both the concentration and the spectrophotometric measurements of the Fe-PSAP complex, but also for reduction of the Fe(III)-PSAP complex. The PSAP complex of Fe(II) or Fe(III) was strongly adsorbed on the anion exchanger in a weakly acidic to weakly basic region, but the Fe(III) complex was readily and completely reduced to the Fe(II) complex only in a neutral to weakly alkaline region in the solid phase. These properties were utilized to determine the Fe(II) and total Fe concentration without the addition of any reducing agent. The detection limits (3 sigma) were 0.18 ng for Fe(II) and 0.18 ng for total Fe using a 3.2-cm(3) sample solution. The present method is applicable to the determination of dissolved iron species present at mu g dm(-3) levels in natural water samples.

    DOI: 10.2116/analsci.28.225

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  • Oxidation of Chromium(III) by Free Chlorine in Tap Water during the Chlorination Process Studied by an Improved Solid-Phase Spectrometry Reviewed

    Sulistyo Saputro, Kazuhisa Yoshimura, Ko Takehara, Shiro Matsuoka, Narsito

    ANALYTICAL SCIENCES   27 ( 6 )   649 - 652   2011.6

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    The oxidation of Cr(III) at naturally-occurring concentration levels, i.e., mu g dm(-3) or lower levels, by free chlorine during the chlorination process of tap water was studied using an improved solid-phase spectrophotometric method, which can be directly applicable to the specific determination of Cr(VI) at mu g dm(-3) or lower levels. The effect of the pH on the oxidation kinetics was investigated under three different pH conditions. The results showed that free chlorine oxidized the Cr(III) to Cr(VI), following the pseudo-first-order kinetics with half lifetimes of 3.0, 3.3 and 14.4 h at pH 5.0, 7.0 and 8.0, respectively, if the hypochlorite concentration was maintained at 4 mg Cl dm(-3).

    DOI: 10.2116/analsci.27.649

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  • Differential Pulse Voltammetric Determination of Free Chlorine for Water Disinfection Process Reviewed

    Sulistyo Saputro, Ko Takehara, Kazuhisa Yoshimura, Shiro Matsuoka, Narsito

    ELECTROANALYSIS   22 ( 23 )   2765 - 2768   2010.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY-V C H VERLAG GMBH  

    The electrochemical detection of free chlorine based on the reduction at a gold electrode has been studied. The differential pulse voltammetric curves exhibited well-defined cathodic peaks. Investigations with this system suggested that the active species in the cathodic reaction is HClO. Excellent reproducibility was demonstrated at pH 5. The peak height could be used for accurate and rapid determination of free chlorine in a sample water. A linear relationship (r(2) = 0.99) was found for the concentration range of 1-5 mgCldm(-3) and the detection limit was estimated to be 0.04 mgCldm(-3).

    DOI: 10.1002/elan.201000322

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  • Improved Solid-phase Spectrometry for the Microdetermination of Total and Dissolved Phosphate Reviewed

    Masaaki Koga, Shiro Matsuoka, Kazuhisa Yoshimura

    ANALYTICAL SCIENCES   26 ( 9 )   963 - 968   2010.9

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    Solid-phase spectrophotometry has been improved for the determination of the total and dissolved phosphate in water. The target phosphate-P at sub-mu g dm(-3) to lig dm(-3) levels in a 20-cm(3) water sample was concentrated as the molybdenum blue species to 0.06 or 0.12 cm(3) using a Sephadex G-25 within 30 min, and gel beads were introduced to a 1.5-mm or 3-mm diameter flow cell having a 10-mm light path length. To minimize the error caused by any difference in the packing state of the gel beads in the cell for each measurement, the absorbances of the blue color were directly measured at 836 nm and at 450 nm using a UV-visible spectrophotometer. The absorbance difference (AA) of the two wavelengths was used for determining the trace amounts of P. The sensitivity achieved by this procedure was higher by a factor of over 100 for a 20-cm(3) sample compared to that of the corresponding solution method using a 10-mm cell, and the detection limit was as low as 0.1 mu g dm(-3). Higher sensitivity was obtained using 100 cm(3) water samples. Trace levels of the total and dissolved phosphate at sub-fig dm(-3) to jig dm(-3) levels in samples from mountainous small streams were directly determined without any preconcentration procedures.

    DOI: 10.2116/analsci.26.963

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  • Recent trends in solid phase spectrometry: 2003-2009. A Review Invited Reviewed

    Shiro Matsuoka, Kazuhisa Yoshimura

    ANALYTICA CHIMICA ACTA   664 ( 1 )   1 - 18   2010.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    Around 100 papers published from 2003 to the present are reviewed concerning analytical methods for the direct light measurement of a solid phase in which a target colored or fluorescent analyte is concentrated. Recent attention has been paid to the development of flow injection-solid phase spectrometry as a simple and inexpensive tool for routine analysis of organic compounds or pharmaceuticals. Due to some improvements in flow injection analysis, such as sequential injection and lab-on-a-valve, it is possible not only to reduce the reagent consumption but also to devise fully automatic and miniaturized systems with minimal maintenance needs. This may have the potential of becoming one of the green analytical methods. Flow injection-solid phase spectrometry is expected to be applied to the speciation of trace chemical components (e.g., specific determination of trace metal ions in different existent oxidation states) in real samples in the environment. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.aca.2010.01.041

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  • Improved Solid-phase Spectrophotometry for the Microdetermination of Chromium(VI) in Natural Water Reviewed

    Sulistyo Saputro, Kazuhisa Yoshimura, Shiro Matsuoka, Ko Takehara, Narsito

    ANALYTICAL SCIENCES   25 ( 12 )   1445 - 1450   2009.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:JAPAN SOC ANALYTICAL CHEMISTRY  

    A simple and sensitive solid-phase spectrophotometry procedure was improved for the microdetermination of Cr(VI). A 0.06 cm(3) portion of a cation exchanger, Muromac AG 50W-X2, was used to concentrate the target Cr(VI) in a 20 cm(3) water sample, and resin beads were introduced in a flow cell of 1.5 mm diameter and having a 10 mm light path length for measurements using a UV-visible spectrophotometer. Three lenses were used for focusing the incident light beam and for recovering light scattered by the solid phase in the cell. The sensitivity achieved was higher by a factor of 277 compared with that of the solution method, and the detection limit was 0.014 mu g dm(-3). The recovery on spiked real water samples by the standard addition method was 96 - 101%. Favorable working and performance characteristics made it possible to directly determine sub-mu g dm(-3) amounts of Cr(VI) in natural water samples.

    DOI: 10.2116/analsci.25.1445

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  • Interaction of boric acid with salicyl derivatives as an anchor group of boron-selective adsorbents Reviewed

    Yoshinobu Miyazaki, Hidenobu Matsuo, Takao Fujimori, Hiroyuki Takemura, Shiro Matsuoka, Tadashi Okobira, Kazuya Uezu, Kazuhisa Yoshimura

    POLYHEDRON   27 ( 13 )   2785 - 2790   2008.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    The complexation ofboricacid with salicylic acid, salicyl alcohol and bis(hydroxymethyl)phenol derivatives has been investigated in detail using B-11 NMR spectroscopy. Boric acid accepts an electron pair through the nucleophilic attack of the ligand, followed by a condensation reaction, to form the 1: 1 monochelate complex. The monochelate complex then reacts with the ligand through the condensation reaction to give the 1:2 bischelate complex. Bis(hydroxymethyl)phenol derivatives formed quite stable chelate complexes among the examined salicyl derivatives. it was clarified by molecular modeling calculations that the complexation with bis(hydroxymethyl)phenol derivatives was highly favorable from an enthalpy viewpoint. An anion-exchange resin presorbed with 3,5-bis(hydroxymethyl)-4-hydroxybenzoate had a strong adsorbability of boron over a wide pH range. The adsorbent quantitatively removed boron up to approximately a half amount of the loaded ligand, which indicated that the boron species adsorbed onto the resin was predominantly present as the -3 charged 1:2 bischelate complex. The formation constant of the 1:2 bischelate complex with 3,5-bis(hydroxymethyl)-4-hydroxybenzoate in the resin phase was estimated to be log (beta) over bar (f(BLAc2)) = 5.0, which almost agreed with those of the salicyl alcohol derivatives in aqueous solutions. (C) 2008 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.poly.2008.06.007

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  • Electrochemical control of the bioluminescence by bacterial luciferase using platinum-mesh electrode Reviewed

    Ko Takehara, Shinya Nakashima, Shinya Yamasaki, Shiro Matsuoka

    CHEMISTRY LETTERS   36 ( 11 )   1358 - 1359   2007.11

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    Bioluminescence reaction by bacterial luciferase has been successfully controlled by a controlled-potential electrolysis using platinum-mesh electrode to regenerate the reduced form of flavin mononucleotide (FMNH2), which is one of the substrates of the reaction. It was found that the regeneration of FMNH2 is facilitated by the adsorbed hydrogen atoms formed on a platinum electrode surface in the presence of phosphate ions.

    DOI: 10.1246/cl.2007.1358

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  • Kinetic study on Cr(VI) reduction in natural water by means of flow injection-solid phase spectrometry (FI-SPS) Reviewed

    T. Tsuruhara, K. Takehara, K. Yoshimura, S. Matsuoka, Sulistyo Saputro, J. Aizawa

    J. Ion Exchange   18 ( 4 )   524 - 528   2007.9

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    DOI: 10.5182/jaie.18.524

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  • Development and prevalidation of a method for phenol determination by solid-phase spectrophotometry Reviewed

    Jadranka Vukovic, Shiro Matsuoka, Kazuhisa Yoshimura, Vladimir Grdinic, Renata Jurisic Grubesic

    MICROCHIMICA ACTA   159 ( 3-4 )   277 - 285   2007.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:SPRINGER WIEN  

    A simple, sensitive and rapid solid-phase spectrophotometric procedure was developed for the determination of traces of phenol with 4-aminoantipyrine as a reagent (AAP-SPS), and the optimal experimental conditions were established. This method was performed by sorption and direct absorbance measurements of the product phenol-AAP sorbed on the anion-exchanger Dowex 1-X4 (0.2 g) at 495 nm (absorption maximum) and 700 nm (non-absorption wavelength). The sensitivity offered by the AAP-SPS procedure was higher by a factor of 40 compared with the respective conventional spectrophotometric method. Metrological characteristics were established using a prevalidation strategy. The AAP-SPS procedure is characterized by a linear calibration function in the working range of 0.05-0.50 mu mol, low standard deviation of procedure (+/- 0.012), low limit of determination (0.021 mu mol), and favorable random (+/- 0.85 to +/- 11.27%) and systematic deviations (-4.55 to +/- 11.50%). Moreover, the accuracy of the system investigated by the recovery test is acceptable (99-102%). Favorable working and performance characteristics make the new SPS method ideal for phenol monitoring in pharmaceutical preparations as well as other matrices.

    DOI: 10.1007/s00604-007-0748-5

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  • Simultaneous determination of traces of heavy metals by solid-phase spectrophotometry Reviewed

    J. Vukovic, S. Matsuoka, K. Yoshimura, V. Grdinic, R. Jurisic Grubesic, O. Zupanic

    TALANTA   71 ( 5 )   2085 - 2091   2007.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    A coupling sensitive solid phase spectrophotometric (SPS) procedure for determination of traces of heavy metals (Me-SPS) and multicomponent analysis by multiple linear regressions (MA), a simple methodology for simultaneous determination of metals in mixtures was inaugurated. The Me-SPS procedure is based on sorption of heavy metals on PAN-resin and direct absorbance measurements of colour product Me-PAN sorbed on a solid carrier in a 1-mm cell. This methodology (Me-SPS-MA) was checked by simultaneous determination of metals in synthetic mixtures with different compositions and contents of metals important in pharmaceutical practice: Zn, Pb, Cd, Cu, Co, and Ni. Good agreement between experimental and theoretical amounts of heavy metals is obtained from the recovery test (78.3-110.0%). The proposed method enables determination of particular metal ion at the ng mL(-1) level and it was successfully applied to the determination impurities from heavy metal traces in pharmaceutical substances (Cu in ascorbic acid, Pb in glucose, and Zn in insulin). The proposed procedure could be possible contribution to the development of pharmacopoeial methodology for a heavy metals test. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.talanta.2006.09.036

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  • Classification of the binding modes in bovine serum albumin using terminally substituted alkane analogues Reviewed

    Ko Takehara, Yuki Morinaga, Shinya Nakashima, Shiro Matsuoka, Hiroshi Kamaya, Issaku Ueda

    ANALYTICAL SCIENCES   22 ( 12 )   1571 - 1575   2006.12

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    With the fluorescence probe of 8-anilino-1-naphthalenesulfonate (ANS), the binding modes of terminally substituted alkane analogues (CnX; X = COOH, OH, CHO, NH3, CONH2) to bovine serum albumin (BSA) were investigated using a competitive binding technique. The Scatchard plot of the fluorometric titration of BSA with ANS showed that the maximum binding number of ANS, n(max), was 3.81, with the binding constant, K-bnd, of 1.42 x 10(6) mol(-1) dm(3). The binding modes of CnX to BSA were analyzed based on the fluorometric titration of the ANS and BSA mixture with CnX. CnCOOH completely displaced the ANS bound to BSA, whereas CnOH and CnCHO displaced only about 40% of the ANS bound to BSA. In contrast, CnNH2 and CnCONH2 displaced very little bound ANS. By comparing these results, we classified the binding modes of CnX to BSA into three types. Two of them are detectable with the ANS fluorescence and the remaining one is not detectable with the fluorescence.

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  • On-line electrochemical oxidation of Cr(III) for the determination of total Cr by flow injection-solid phase spectrophotometry Reviewed

    Shiro Matsuoka, Yu Nakatsu, Ko Takehara, Sulistyo Saputro, Kazuhisa Yoshimura

    ANALYTICAL SCIENCES   22 ( 12 )   1519 - 1524   2006.12

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    A novel on-line oxidation method of ultra-trace Cr(III) dissolved in natural water has been developed using a flow electrolysis cell. This method was successfully applied to the determination of the total Cr concentration by flow injection-solid phase spectrophotometry using diphenylcarbazide as a coloring agent. With the applied potential of 1.35 V (vs. Ag/AgCl) and the flow rate of 0.80 cm(3) min(-1), Cr(III) was quantitatively oxidized to Cr(VI) at room temperature. The total Cr concentration of sub-mu g dm(-3) in 3 - 4 samples could be determined within I h using an aqueous sample volume of 7.1 cm(3). The analytical values of the total Cr concentration in natural water were in good agreement with those obtained by ICP-MS. The detection limit of the proposed method was 0.014 mu g dm(-3) (3 sigma, n = 7). This method could be applied to the specific determination of Cr(III) and Cr(VI) in river water samples.

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  • Determination of trace amounts of cobalt(II) by flow injection-solid phase spectrometry (FI-SPS) with 5-Br-PADAB Reviewed

    S Matsuoka, N Shiota, K Yoshimura

    ANALYTICAL SCIENCES   22 ( 1 )   177 - 181   2006.1

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    kFlow injection-solid phase spectrometry (FI-SPS) has been applied to the determination of cobalt(II) in water samples. The complex formed between cobalt and 5-Br-PADAB was on-line protonated and concentrated on an AG 50W-X2 cation-exchanger in a flow-through cell. The increase in absorbance caused by the accumulation of the complex in the resin was continuously measured. The interference by copper could be effectively eliminated by using EDDP as a masking agent. The detection limit was 40 ng dm(-3) with a 4.0 cm(3) sample solution.

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  • Solid-phase spectrometry and its application to flow injection analysis Reviewed

    S Matsuoka, K Yoshimura

    BUNSEKI KAGAKU   54 ( 12 )   1137 - 1147   2005.12

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    Solid-phase spectrometry (SPS) is based on the direct spectrometric measurement of solid phase which has sorbed a sample component. Direct application of the method mekes it possible to determine trace components in water samples without preconcentration. This method could be applied to a new type of FIA detection system, in which on-line detection with solid-phase retention of analytes is carried out. The sensitivity enhancement is easily accomplished by increasing the sample volume introduced. Analytes present in the mu g similar to sub-mu g dm(-3) range can be easily determined by using this system. The fundamental background and applicability of SPS and FI-SPS are described.

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  • Complexation of vanadium(V) oxoanion with ethanolamine derivatives in solution and in a cross-linked polymer Reviewed

    Y Miyazaki, S Matsuoka, Y Miura, H Sakashita, K Yoshimura

    POLYHEDRON   24 ( 9 )   985 - 994   2005.6

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    Complex formation between vanadate and various ethanolamine derivatives (ethanolamine, diethanolamine, methyldiethanolamine, triethanolamine and ECTEOLA-Cellulose) has been examined in detail by using V-51 NMR spectroscopy. Vanadate binds with ethanolamine to form 1:1 (O)-monodentate and (N,O)-bidentate complexes which are protonated and deprotonated forms, respectively. Ethanolamine undergoes a comparatively weak interaction with vanadate relative to the other ligands. V-51 NMR spectra clearly show that vanadate reacts with the functional group of ECTEOLA-Cellulose, as well as diethanolamine, methyldiethanolamine and triethanolamine, which are analogues of the functional groups of ECTEOLA-Cellulose, to form the -1 charged 1:1 (N,O,O)-tridentate complex. In addition to anion exchange interaction of monovanadate and isopolyvanadate anions with the protonated functional group, in the alkaline region the adsorbability of vanadium(V) onto ECTEOLA-Cellulose is a consequence of the complexation of vanadate with the functional group. The formation constant of the (N,0,0) complex with ECTEOLA-Cellulose was estimated to be log beta((N,O,O)) = 3.6, which was almost the same as those with the analogues of the functional group. (c) 2005 Elsevier Ltd. All rights reserved.

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  • B-11 NMR study on the interaction of boric acid with Azomethine H Reviewed

    H Matsuo, Y Miyazaki, H Takemura, S Matsuoka, H Sakashita, K Yoshimura

    POLYHEDRON   23 ( 6 )   955 - 961   2004.3

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    B-11 NMR spectroscopy provided direct evidence that boric acid reacts with Azomethine H to form a 1: 1 bischelate complex. A new peak with a -17.9 ppm chemical shift is due to the chelate complex containing tetrahedral boron. It has been quantitatively confirmed that the reaction includes two chemical equilibria;, one is related to the ligand formation and the other to the complex formation. The formation constant for the ligand is small, less than 10, whereas that for the complex is relatively large, greater than 10(5). Azomethine H is hydrolyzed in aqueous solution because of its low stability, and the ligand formation is responsible for the nature of its complexation with boric acid. (C) 2004 Elsevier Ltd. All rights reserved.

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  • Fundamental studies on ion-exchanger phase absorptiometry Reviewed

    S. Matsuoka, Y. Tennichi, K. Yoshimura

    J. Ion Exchange   14 (Supplement)   313 - 316   2003.7

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  • Speciation of Boron Species Adsorbed onto Polysaccharide Gel by 11B NMR Spectroscopy Reviewed

    Y. Miyazaki, C. Shao, S. Matsuoka, K. Yoshimura

    J. Ion Exchange   14 (Supplement)   33 - 36   2003.7

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  • Anion exchanger as a reaction/separation medium - absorptiometric determination of trace amounts of boron in waters by on-line complexation with chromotropic acid presorbed on the anion-exchange column Reviewed

    CY Shao, S Matsuoka, Y Miyazaki, K Yoshimura

    ANALYST   127 ( 12 )   1614 - 1620   2002

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    A novel method of on-line absorptiometric determination for trace amounts of boron was developed based on the complexation with chromotropic acid presorbed on an anion-exchange column. On-line reaction and separation were achieved by controlling pH conditions in solutions to accelerate the 1:2 complex formation in the concentration process at pH 3 and to stabilize the complex in the separation process at pH 8. About 75% of the boron introduced into the stream was kinetically collected as the 1:2 complex on the column under the experimental conditions. The 1:2 complex was satisfactorily separated from excess reagent and matrix components by changing the concentration of NaClO4 in the eluent and its peak height on the chromatogram monitored at 350 nm was used for calibration. The sensitivity could be enhanced by increasing the sample amount introduced and the detection limits (3sigma) were 162 ng dm(-3) and 45 ng dm(-3) of boron, when 5.0 cm(3) and 13.4 cm(3) of the samples were used, respectively. The method has been successfully applied to the determination of boron in samples of river water, tap water and ion-exchanged water.

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  • Studies on the complexation of boric acid with polyhydroxyl compounds Reviewed

    C. Shao, S. Matsuoka, Y. Miyazaki, K. Yoshimura

    Anal. Sci.   17   i1475 - i1478   2001.8

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  • Simultaneous determination of trace metals by solid phase absorptiometry: application to flow analysis of some rare earths Reviewed

    Y Tennichi, S Matsuoka, K Yoshimura

    FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY   368 ( 5 )   443 - 448   2000.11

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    Solid phase absorptiometry was applied to the simultaneous flow analysis of trace metals in combination with a micro black flow-through cell packed with ion exchanger beads and a multi-channel photodetector connected with optical fibers. A 4.0 cm(3) sample solution containing five rare earth metal ions (Dy, Ho, Tm, Er and Nd) was introduced into a flow system and these metal ions were concentrated on a cation exchanger (Muromac 50W-X4) in a flow-through cell. The absorbance increases originating from the f-f or d-f transition bands of these metal ions were directly and continuously measured at 910 nm for Dy, at 530 nm for Ho, at 683 nm for Tm, 522 nm for Er and at 790 nm for Nd, respectively. A multi-variable analysis method was combined with the flow analysis because the absorption spectra of the five rare earth metal ions partly overlapped one another. Although no coloring reagents were used, the proposed method was about 200 times more sensitive than the corresponding solution method. The reproducibility of this method was less than +/- 5%. The detection limits were 0.03, 0.40, 0.30, 0.35 and 0.23 mg dm(-3) for Dy, Ho, Tm, Er and Nd, respectively. Five rare earth metal ions could be precisely determined in practical samples such as yttrium concentrate.

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  • Complexation of borate with cross-linked polysaccharide anion exchanger: 11B NMR and adsorption properties studies Reviewed

    Chaoying Shao, Yoshinobu Miyazaki, Shiro Matsuoka, Kazuhisa Yoshimura, Hirofumi Sakashita

    Macromolecules   33 ( 1 )   19 - 25   2000.1

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    Boron adsorption behavior on cross-linked polysaccharide anion exchangers, QAE-Sephadex and QA cellulose, was examined in detail by 11B NMR measurements and distribution studies. For the QAE-Sephadex system, two signals of 1:1 borate complexes with α,β and α,γ-diol moieties of the glucopyranoside residues were observed, showing identical chemical shift values with those for the Sephadex gel system. Only the 1:1 complex of borate with α,β-diol moiety of the gel matrix was formed for QA cellulose. The formation constants of the borate complexes, estimated by the signal intensities of 11B NMR, were almost the same in the anion exchangers and Sephadex gel. The adsorbability of boric acid/borate was not enhanced as much by the presence of charged functional groups, because both the ion-exchange selectivity toward borate and formation constants of borate complexes with the gel matrix are not so high. The pH in the anion exchanger phase is higher than that in the external equilibrated solution, however, is slightly lower than the value expected from the Donnan relation, as a result of the fixation of anionic borate onto the gel matrix by the complexation: -log[H+]̄ = -a log[H+]+b(α≤1 and b&gt
    O). Boron adsorption behaviors on the polysaccharide anion exchangers, such as pH dependence, boron concentration dependence, and background electrolyte effect, can be explained satisfactorily on the basis of such properties.

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  • Equilibrium and kinetic studies on the complexation of boric acid with chromotropic acid Reviewed

    CY Shao, S Matsuoka, Y Miyazaki, K Yoshimura, TM Suzuki, DAP Tanaka

    JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS   18 ( 18 )   3136 - 3142   2000

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    The complexation of boric acid with chromotropic acid in aqueous solution was examined thoroughly by B-11 NMR measurements. Two peaks with chemical shift values of delta -17.7 and -18.0 were observed besides the free boric acid/borate peak and ascribed to the 1:1 and the 1:2 complexes, respectively. The 1:2 complex is formed in acidic solution, while the 1:1 complex prevails in a higher pH range. The formation constants for these complexes were evaluated based on the signal intensities of B-11 NMR spectra to be log beta(1)=-1.57 and log beta(2)=2.35, which are well consistent with those reported previously as well as that (beta(2)) obtained kinetically in this work. The chromatographic separation of the 1:2 complex from the other species enabled a kinetic study of the reaction which revealed that the reaction for 1:1 complex formation takes place much faster than that for 1:2 complex formation. The pH dependences of the rate constants of the forward and backward reactions of the 1:2 complexation could be interpreted by the catalytic role of hydrogen ions in the reactions. Plausible mechanisms for both the reactions of 1:2 complex formation and decomposition were proposed. On the basis of the equilibrium and kinetic information on the complexation, the optimum conditions for practical applications of the ligand so far reported could be well understood.

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  • Solid-phase spectrometry and its application to the flow analysis of trace elements Reviewed

    S Matsuoka

    BUNSEKI KAGAKU   48 ( 11 )   1027 - 1028   1999.11

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    The applicability of solid-phase spectrometry to flow analysis has been studied for the sensitive determination of target trace elements in natural-water samples. By a fundamental study involving light measurements, it has been confirmed that Beer's law can be applied to around the 4 to 5 absorbance scale in a solid particle layer system. Lambert's law was also confirmed up to a cell length of 4 cm if the Pt tube cell was used. On the basis of obtained data, a flow-through cell packed with fine spherical beads has been tested as a detector in flow-analysis systems for the sensitive determination of some elements such as cobalt(II), chromium, copper(II), molybdenum (VI) and vanadium as well as some rare earth elements and aluminium. By only using a few cm(3) of the sample solution, the proposed method enabled us to determine the target chemical species present at mu g dm(-3) or lower levels in 3-6 samples in less than 1 hour. By a practical application of the proposed method to natural-water analysis, some significant information, unavailable by other determination methods, could be obtained: for example, details on die oxidation states of chromium present at sub-mu g dm(-3) levels in natural water.

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  • Flow analysis of micro amounts of chromium(III) and (VI) in natural water by solid phase spectrophotometry using diphenylcarbazide Reviewed

    S Matsuoka, Y Tennichi, K Takehara, K Yoshimura

    ANALYST   124 ( 5 )   787 - 791   1999.5

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    Specific determination of chromium(III) and chromium(VI) in natural water samples was performed without mutual separation. The chromium in sample solution was concentrated on cation-exchange resin packed in a flow-through cell as a reaction product of chromium(VI) with diphenylcarbazide. The absorbance increase caused by the accumulation of the complex on cation-exchange resin was continuously measured. By using peroxodisulfate as an oxidizing agent, the chromium(III) in sample solution was completely oxidized to chromium(VI). The chromium(III) concentration was calculated by the difference between the values of the total chromium and chromium(VI). The detection limit for chromium(VI) and total chromium was 70 pg and 120 pg, respectively. This method was applied to the specific determination of chromium in several natural water samples. The results of the total chromium obtained by the proposed method show moderate agreement with that obtained with ICP-MS. Unlike the previous results reported in chromium speciation studies, the predominant chromium species in natural water was chromium(VI).

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  • Application of solid-phase absorptiometry to microscopic spectroscopy Reviewed

    S Matsuoka, K Yoshimura, A Tateda, Shinno, I

    BUNSEKI KAGAKU   47 ( 6 )   335 - 340   1998.6

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    The applicability of solid-phase absorptiometry to a minute solid particle has been studied for the sensitive determination of target trace elements present in a small volume of sample solutions. An iron(II)-phenanthroline complex or a Cr(VI)-diphenylcarbazide complex in 1 cm(3) of a sample solution was concentrated in a spherical bead of cation-exchange resin having a particle size of about 0.8 mm. The light attenuance of this par tide was measured using a polarizing microscope attached to a photo-detector. The sensitivity of the proposed method was 280-times greater than that of the conventional corresponding solution method, which was considered to agree with the expected value of 300. Although the size of the respective cation-exchange resin particle was not very uniform, a reproducible measurement of the absorbance due to the colored chemical species sorbed could be made. The calibration graph was straight and Beer's law could be also applied, even to a minute spherical bead.
    The proposed method is thought to be effective for analyzing trace elements in samples which are hardly obtained in large amounts, such as rain-water samples.

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  • Complexation of boric acid with the N-methyl-D-glucamine group in solution and in crosslinked polymer Reviewed

    Kazuhisa Yoshimura, Yoshinobu Miyazaki, Fumio Ota, Shiro Matsuoka, Hirofumi Sakashita

    Journal of the Chemical Society - Faraday Transactions   94 ( 5 )   683 - 689   1998.3

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    N-Methylglucamine resin has been shown to be a good adsorbent for borate or boric acid. Above ca. pH 6, the boron adsorbability of this resin increased with a maximum around pH 9. The maximum distribution ratio was higher than 106, however, further increase in pH resulted in a decrease in the distribution ratio. The combination of distribution and 11B MAS NMR measurements revealed the formation of a 1:1 tetradentate complex of B(OH)4 - with the N-methylglucamine group. The calculated pH-dependence of boron adsorption agreed well with the experimental results with respect to the -log [H+] values in the resin phase (not in the external solution) estimated by 31P NMR measurements. The maximum adsorption around pH 9 of the equilibrated solution is due to the fact that the pH in the resin phase remains higher than that in the external solution. Therefore, B(OH)3/B(OH)4 - is selectively concentrated into the resin phase and by the dehydration condensation B(OH)4 - forms the 1:1 tetradentate complex with the anchor group. The overall formation constant of the complex was estimated to be 104.0±0.1, which was almost the same magnitude as that of the 1:1 monochelate complex with an α,β-diol site of N-methyl-D-glucamine (which is an analogue of the functional group of the resin) in aqueous solutions of pH 5.1-7.4. However, the binding structures of each 1:1 complex with the N-methyl-D-glucamine group are quite different in the aqueous solution and in the crosslinked polymer.

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  • 山口県秋芳洞洞口のトゥファ形成におけるシアノバクテリアの役割 Reviewed

    吉村 和久, 井上 真理, 染谷 孝, 松浦 健太郎, 橋口 美保子, 原 友子, 大坪 久記, 松岡 史郎

    洞窟学雑誌   20   27 - 37   1996.3

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  • Application of ion-exchanger phase visible light absorption to flow analysis. Determination of vanadium in natural water and rock Reviewed

    S Matsuoka, K Yoshimura, A Tateda

    ANALYTICA CHIMICA ACTA   317 ( 1-3 )   207 - 213   1995.12

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    Ion-exchanger phase visible light absorptiometry combined with flow analysis has been developed and applied for the determination of vanadium in natural water and rock. The vanadium(IV) and vanadium(V) in the sample solution reacted with xylenol orange (XO) which was immobilized on the AG 1-X2 anion-exchanger packed in flow-through cell, and the increase in light absorption caused by the formation of the vanadium-XO complex in the resin was directly measured with a spectrophotometer at 532 nm. The interference by most of the co-existing ions can be effectively eliminated using trans-1,2-cyclohexanediamine-N,N,N',N'-tetraacetic acid (CyDTA) and ammonium tartrate. The detection limit was 80 ng dm(-3) with 5.0 cm(3) of sample solution. Vanadium contents in three sample solutions could be determined within 1 hour.

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  • Application of solid-phase spectromrtry to flow analysis Reviewed

    Shiro Matsuoka, Kazuhisa Yoshimura

    12 ( 1 )   8 - 22   1995.1

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  • Recent Progress in Solid-phase Spectrometry: Its Application to Flow Analysis Invited Reviewed

    K. Yoahimura, S. Matsuoka

    Laboratory Robotics and Automation   5   231 - 244   1993.2

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  • FLOW-ANALYSIS FOR TRACE AMOUNTS OF COPPER BY ION-EXCHANGER PHASE ABSORPTIOMETRY WITH 4,7-DIPHENYL-2,9-DIMETHYL-1,10-PHENANTHROLINE DISULFONATE AND ITS APPLICATION TO THE STUDY OF KARST GROUNDWATER STORM RUNOFF Reviewed

    K YOSHIMURA, S MATSUOKA, Y INOKURA, U HASE

    ANALYTICA CHIMICA ACTA   268 ( 2 )   225 - 233   1992.10

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    Ion-exchanger phase absorptiometry was applied to flow analysis for trace amounts of copper in water. The increase in the absorbance of the coloured complex with 4,7-diphenyl-2,9-dimethyl-1,10-phenanthroline disulphonate, which was concentrated on-line on to an ion exchanger packed in a flow-through cell, could be measured continuously with a spectrophotometer at 484 nm. The detection limit was 0.08 ng cm-3 with 8.3 cm3 of sample solution. The proposed method permitted a highly sensitive, selective determination of copper in karst groundwater samples without any preconcentration. By measuring the copper concentration response in water after a storm, the infiltration rate of rain water from the soil zone to the underground river of a karst groundwater system could be evaluated to be about 10-20 m day-1.

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  • Determination of Aluminium in High Purity Water by Ion-exchanger Phase Spectrofluorometry Combined with Flow Analysis

    S. Matsuoka, K. Yoshimura, A. Tateda

    Mem. Fac. Sci., Ser. C, Kyushu Univ.   18 ( 2 )   169 - 178   1992.9

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  • Application of ion-exchanger phase spectrofluorimetry to the determination of micro-amounts of some rare earth elements by flow analysis Reviewed

    Kazuhisa Yoshimura, Shiro Matsuoka, Toyohisa Tabuchi, Hirohiko Waki

    The Analyst   117 ( 2 )   189 - 193   1992

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    The fluorescence bands originating from d→f electron transitions, which can be used to determine europium, terbium, dysprosium or samarium selectively, were enhanced only if these elements were sorbed in a weak-acid cation-exchange gel, i.e., CM-Sephadex. After a sample solution had been introduced into a fused-silica tube (1.5 mm i.d.) packed with 1 mg of CM-Sephadex, the fluorescence intensity increase, resulting from the rare earth elements sorbed in the ion-exchange gel, could be measured directly with good precision. For europium, the detection limit was 22 ng with an 8.3 cm 3 sample solution. The sensitivity of the proposed method depended on the sample volume introduced. The cell could be used repeatedly after desorbing the target element with a solution of nitric acid.

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  • FLOW-ANALYSIS METHOD FOR TRACE-ELEMENTS BY ION-EXCHANGER PHASE ABSORPTIOMETRY Reviewed

    K YOSHIMURA, S MATSUOKA

    ION EXCHANGE ADVANCES   183 - 190   1992

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  • Flow Injection Analysis of Phosphate Ion with the Liquid Chloranilate Selective Membrane Electrode as a Detector

    S. Matsuoka, A. Tateda

    Mem. Fac. Sci., Kyushu Univ., Ser.C   18 ( 1 )   49 - 54   1991.9

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  • Application of Ion-exchanger Phase Absorptiometry to Flow Analysis-Determination of Vanadium(V) in Natural Water

    S. Matsuoka, J. Yoshimura, H. Waki

    Mem. Fac. Sci., Ser. C, Kyushu Univ.   18 ( 1 )   55 - 62   1991.9

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  • SPECTROPHOTOMETRIC APPLICATION OF ION-EXCHANGER FLOW-ANALYSIS OF CHROMIUM(VI) IN NATURAL-WATERS BY ION-EXCHANGER PHASE ABSORPTIOMETRY Reviewed

    K YOSHIMURA, S MATSUOKA

    NEW DEVELOPMENTS IN ION EXCHANGE   377 - 382   1991

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  • The Property of the Liquid Chloranilate Selective Membrane Electrode Based on Cadmium-(1,10-penanthroline) Ion and the Indirect Determination of Phosphate Ion

    A. Tateda, S. Matsuoka

    Mem. Fac. Sci., Kyushu Univ., Ser. C   17 ( 2 )   207 - 212   1990.9

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  • Determination of molybdenum(VI) in natural water and rock by ion-exchange absorptiometry combined with flow analysis Reviewed

    Kazuhisa Yoshimura, Shiro Matsuoka, Hirohiko Waki

    Analytica Chimica Acta   225 ( C )   313 - 321   1989

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    Ion-exchange absorptiometry combined with flow analysis has been applied to the determination of trace amounts of molybdenum(VI) in natural water and rock. By using a pretreatment column packed with Sephadex G-25 gel, molybdenum(VI) in a sample solution can be sorbed selectively on the gel at pH 3.5. The molybdenum(VI) in the column was desorbed with EDTA as the molybdenum(VI)-EDTA complex, and the solution was introduced into a Tiron solution stream. The yellow complex formed between molybdenum(VI) and Tiron in the flow system was then concentrated on a QAE-Sephadex A-25 anion exchanger packed in a flow-through silica micro-cell. The attenuation of incident light by the molybdenum(VI)-Tiron complex on the anion exchanger in the cell was continuously recorded with a spectrophotometer at 410 nm. The complex on the anion exchanger was easily desorbed with sodium nitrate, so the flow-through cell could be used repeatedly. The minimum amount that could be detected corresponded to 15 ng of molybdenum(VI). Molybdenum(VI) in three or four sample solutions could be determined within 1 h. © 1989.

    DOI: 10.1016/S0003-2670(00)84620-6

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Books

  • 製品中に含まれる (超)微量成分・不純物の同定・定量ノウハウ

    松岡史郎, Sarenqiqige, 吉村和久( Role: Joint author ,  第1章第7節 固相分光法による超微量成分分析 -水中の溶存微量成分の簡易高感度分析法、溶存クロムなどの分析事例)

    株式会社 技術情報協会  2014.2 

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    Language:Japanese Book type:Scholarly book

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  • Chlorine: Properties, Applications and Health Effects, Chapter 8: "Analytical methods of chlorine and the substances produced by the chlorine treatments"

    S. Saputro, K. Yoshimura, K. Takehara, S. Matsuoka, Narsito (Roger Mangione, Dana Carlile( Role: Joint author)

    Nova Science Publishers Inc.  2011.10 

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  • 分析化学便覧(改訂第6版)

    日本分析化学会編( Role: Joint author ,  吸光光度法(8.4.3 項),イオン交換(8.7.1))

    丸善出版  2011.9  ( ISBN:4621084097

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    Language:Japanese Book type:Dictionary, encyclopedia

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  • Handbook of Inorganic Chemistry Research, Chapter 8: "Complexation of Boric Acid with Polyhydroxy Compounds and its Relevance to Practical Aspects "

    K. Yoshimura, Y. Miyazaki, S. Matsuoka, K. Takehara, T. Fujimori, Desiree A. Morrison( Role: Joint author)

    Nova Science Pub Inc,  2010.9 

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  • 理系のための基礎化学

    増田芳男, 澤田 清, 編著, 増田芳男, 徳江郁雄, 島倉紀之, 工藤久昭, 佐藤敬一, 丸山健二, 湯川靖彦, 松岡史郎, 澤田 清, 後藤真一( Role: Joint author ,  6・1節,6.2節)

    化学同人  2006.4  ( ISBN:4759810552

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MISC

  • Chemistry of the boric acid-Azomethine H system and its application to voltammetric determination of boric acid in water

    Kô Takehara, Yoshinobu Miyazaki, Takao Fujimori, Shiro Matsuoka, Kazuhisa Yoshimura

    REPORT OF THE CENTER OF ADVANCED INSTRUMENTAL ANALYSIS KYUSHU UNIVERSITY   ( 30 )   10 - 20   2012

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Publisher:THE CENTER OF ADVANCED INSTRUMENTAL ANALYSIS KYUSHU UNIVERSITY  

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  • Complexation of boric acid with polyhydroxy compounds and its relevance to practical aspects

    K. Yoshimura, Y. Miyazaki, S. Matsuoka, K. Takehara, T. Fujimori

    Handbook of Inorganic Chemistry Research   174 - 209   2011.12

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    Complexes of boric acid/borate and polyols play an important role in many fields because of the biological significance in organism metabolism and the practical significance in the electronic industry and agriculture of removing boric acid/borate from water. To thoroughly understand the boron chemistry of the polyols concerned, many studies have been done. Here, an experimental approach to the interaction and its recent progress are first mentioned. 11B NMR spectroscopy is one of the excellent tools for elucidating the nature of the interaction between boric acid/borate and polyols. Its combination with other methods enables basic understanding of the chemical reactions. The complexation is then discussed on a thermodynamic and kinetic basis. Reaction paths for 1:1 complexation are in general divided into two: neutral polyols react directly with tetrahedral borate, whereas acidic polyols can react with trigonal boric acid in a 1:1 complexation. Both of the reactions produce tetrahedral anionic complexes, followed by a condensation reaction between the 1:1 monochelate complex and the undissociated diols to yield the 1:2 bischelate complex. A basic understanding of the complexation makes it possible to clarify the principles on the practical aspects of the complexation, which is finally reviewed. © 2010 Nova Science Publishers, Inc. All rights reserved.

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  • Solid Phase Spectrometry and Its Application to Speciation Analysis of Trace Components in Water

    Shiro Matsuoka, Sarenqiqige, Kazuhisa Yoshimura

    Bunseki   444 ( 12 )   713 - 719   2011.12

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Publisher:The Japan Society for Analytical Chemistry  

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  • 化学発光を用いたCrの酸化状態別分析法

    松岡史郎

    ぶんせき   369 ( 12 )   671 - 671   2007.12

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  • Chemical Speciation of Trace Elements in Natural Water: Specific determination of Trace Inorganic Ions Present in Different Oxidation States

    S. Matsuoka, K. Yoshimura

    Bunseki   2 ( 386 )   87 - 93   2007.2

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  • 11B NMR study on the complexation of borate with boron-selective polymers

    Kazuhisa Yoshimura, Chaoying Shao, Shiro Matsuoka, Yoshinobu Miyazaki, Hirofumi Sakashita

    Report of the Center of Advanced Instrumental Analysis Kyushu University   20   2 - 11   2002.12

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  • ミニファイル 分離 イオン交換

    松岡史郎, 吉村和久

    ぶんせき   317 ( 5 )   247 - 248   2001.5

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  • イオン交換分離:無機成分の分離・濃縮を中心に

    吉村 和久, 松岡 史郎, 天日 美薫

    ぶんせき   282 ( 6 )   430 - 436   1998.6

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  • Fundamentals of Separation: Ion Exchange.

    Shiro Matsuoka, Kazuhisa Yoshimura

    BUNSEKI   275 ( 11 )   28 - 36   1997.11

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  • イオン交換体相吸光光度流れ分析法による微量成分定量法の開発

    松岡史郎, 吉村和久

    九州大学中央分析センターセンターニュース   12 ( 3 )   6 - 9   1995.1

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  • ミニファイル ベリリウム、カルシウム

    松岡史郎, 吉村和久

    ぶんせき   254 ( 12 )   964 - 965   1993.12

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Research Projects

  • Thermodynamics, structure and dynamics of ultra-concentrated electrolyte solutions and solvate ionic liqudis

    Grant number:18H01994

    2018.4 - 2021.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    Umebayashi Yasuhiro

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    Grant amount:\17420000 ( Direct Cost: \13400000 、 Indirect Cost:\4020000 )

    Super-concentrated electrolyte solutions and solvate ionic liquids exhibit ionic conduction and electrode reactions not found in conventional dilute electrolyte solutions. They are hardly explained in the framework of conventional electrolyte solution theory based on continuous dielectric models such as Walden's law and Stokes' law. In addition to macroscopic thermodynamics and transport theory, we approached from structure and dynamics at the molecular level in order to reveal the ion transport and electrode reaction in super-concentrated electrolyte solutions and solvate ionic liquids.

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  • 河川水中に存在するマンガンの溶存状態

    2015.4 - 2017.3

    System name:科学研究費助成事業

    Research category:基盤研究(C)

    Awarding organization:日本学術振興会

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  • Important role of the storm runoff Fe(II) flux in the supply of the dissolved iron in coastal seawater

    Grant number:24651012

    2012.4 - 2015.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Challenging Exploratory Research

    Awarding organization:Japan Society for the Promotion of Science

    YOSHIMURA Kazuhisa, MATSUOKA Shiro, SATODA Makoto, AIMOTO Michihiro, KATO Toshiaki, TENNICHI Yoshika, SAREN Qiqige, KAI Satsuki, BANNO Yu, MATSUMOTO Megumi, UEHARA Wataru

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    Grant amount:\3900000 ( Direct Cost: \3000000 、 Indirect Cost:\900000 )

    One of the causes of Isoyake, sea desert, around the Japan coast is attributed to the decline in the supply of the dissolved iron from river. Fe(III) complexes of humic substances in the river water should be coagulated when the river water is mixed with seawater. Our hypothesis is that Fe(II) is mainly supplied to the sea during storm runoff and forms dissolved Fe(III)-organic complexes in the presence of O2. To prove this hypothesis, on-site analysis method was established using solid-phase spectrophotometry to measure the low concentration of Fe(II). The sample collection method was also established by dissolving CO2 in sample solution to decrease pH and the dissolved O2 concentration and then by keeping pH at 2 within 1 hr after the sample collection. The bottom water of high Fe(II) concentration in the river was present in the local reduction environment under anoxic conditions. It was found that the Fe(II) flux at flood runoff was one hundred times more than that at base flow.

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  • 藻場の磯焼けと沿岸海水中に存在する鉄化学種濃度との関連

    2012.4 - 2014.3

    System name:科学研究費助成事業

    Research category:基盤研究(C)

    Awarding organization:日本学術振興会

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    Grant type:Competitive

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  • 磯焼けの原因究明を目的とした沿岸海水中の溶存超微量鉄のスペシエーション

    2006.4 - 2008.3

    System name:科学研究費助成事業

    Research category:基盤研究(C)

    Awarding organization:日本学術振興会

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    Grant type:Competitive

    Grant amount:\1600000 ( Direct Cost: \1600000 )

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  • 陸域炭酸塩堆積物から環境変遷を読む

    Grant number:15651006

    2003 - 2005

    System name:科学研究費助成事業

    Research category:萌芽研究

    Awarding organization:日本学術振興会

    吉村 和久, 松岡 史郎, 松田 博喜, 井倉 洋二

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    Grant amount:\3700000 ( Direct Cost: \3700000 )

    鍾乳石とトゥファから環境情報を取り出すための手法を確立することを目的として、次の項目について検討を行い、それぞれの項目に関して以下の成果を得ることができた。
    1.秋吉台の鍾乳石試料を用いて秋吉台が草原化した時期を明らかにする。
    (1)現在も成長を続ける石筍の絶対年代見積りには、今回確立した顕微蛍光法による年縞の計測が有効であった。
    (2)鍾乳石およびトゥファ中で蛍光を発する成分のキャラクタリゼーションを蛍光スペクトル分析により行い、これらの蛍光にはいずれもフルボ酸の寄与が大きいことを明らかにした。
    (3)草原地域の洞窟の石筍の炭素同位体比の変動を追跡することで、約400年前から継続的な"山焼き"が行われるようになったことがわかった。
    2.平尾台のトゥファを用いて、過去130年間の北九州工業地帯の大気汚染変遷を明らかにする。
    (1)顕微分光法を用いて得られた絶対年代のクロスチェックのために、鍵層を見出すことを試みた。長崎原爆と1960年台初頭の大気圏内核実験に起因する^<137>Csの高濃度部分をトゥファ中で見出すことができた。
    (2)鍾乳石およびトゥファ中の硫酸イオンがイオン交換反応で共沈することを国内および台湾の試料を用いて明らかにした。
    (3)明治以降の北九州工業地帯の大気汚染変遷をトゥファ中の硫酸イオン濃度から読み取ることができた。
    3.大分県稲積水中鍾乳洞の水没鍾乳石から阿蘇火山の大規模活動と鍾乳洞発達史との関連を明らかにする。
    (1)カナダMcMaster大でU-Th法による絶対年代測定を行った大分県稲積水中鍾乳洞の水没鍾乳石について、再検討を行った。水没の原因はAso-4火砕流による谷の埋没にあると考えられていたが、見積もられた絶対年代は17万年前となり、Aso-1とAso-2の間に成長したことが明らかとなった。鍾乳石中の厚さ1mm程度の粘土層の枚数は鍾乳石の水没の回数と一致するものと考えられる。

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  • 受光部に光ファイバ−を装着した分光器を用いた低光量領域における固相の透過光測定

    1998.4 - 2000.3

    System name:科学研究費助成事業

    Research category:奨励研究(A)

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    Grant type:Competitive

    Grant amount:\2100000 ( Direct Cost: \2100000 )

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  • 固相分光法の顕微分光法への応用

    1996.4 - 1997.3

    System name:科学研究費助成事業

    Research category:奨励研究(A)

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    Grant type:Competitive

    Grant amount:\900000 ( Direct Cost: \900000 )

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  • Characterization, Synthesis, and Application of Borate-selective Polymers

    Grant number:06640790

    1994 - 1996

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    YOSHIMURA Kazuhisa, MIYAZAKI Yoshinobu, TAKEMURA Hiroyuki, MATSUOKA Shiro

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    Grant amount:\2100000 ( Direct Cost: \2100000 )

    Studies were done using commercially available linear dextran and crosslinked polyols such as Sephadex gel, QAE-Sephadex anion-exchange dextran gel, and Amberlite IRA-743, a boron-selective resin which has a functional group of N-methylglucamine. Together with the distribution measurements of borate on the crosslinked polymers, ^<11>B NMR spectroscopy was employed to elucidate the nature of the complex formation of borate with the polyols. The results obtained were as follows : (1) for the adsorption of borate on a crosslinked dextran. DELTAH values were comparable to those for the complex formation ob borate with monosaccharides and the borate concentration dependence of boron adsorption is a characteristic property of the crosslinked dextran. (2) Well-resolved ^<11>B NMR spectra for the solid gel as well as for a dextran solution were observed. In the dextran system, borate complexes both with alpha, beta-diols and alpha, gamma-diols of glucopyranoside residues were present. This crosslinking of dextran caused the effective concentration of alpha, beta-diol moieties in the crosslinked polymer ligand to become higher than the practical concentrarion, so that the 1 : 2 complexation became more fovorable accoding to the increase in the degree of crosslinking. (3) The borate concentration dependence of boron adsorption on crosslinked dextran gel may be caused by the exclusion of borate anions from the gel phase due to electrostatic repulsion between borate and the fixed anion sites of borate complexes in the gel phase. The stability constant of each complex is similar to that for the Sephadex system : the presence of the fixed cation group in the QAE-Sephadex gel phase did not promote the boron adsorption. (4) The pH of the N-methylglucamine resin phase remains constant in the range of 10 to 11 when the equilibrated bulk solution is pH 6-11. The strong adsorbability of borate on the resin in a wide pH range is due to this phenomenon. From the ^<11>B MAS-NMR measurements, the active species in the resin were proved to be borate complexes of alpha, beta-diols in the functional groups.
    On the basis of the results obtained, a novel boron-selective polymer was synthesized by introducing tris (hydroxymethyl) groups into chloromethylated polystirene. The properties of this resin are now being investigated.

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  • クロラニル酸の難溶性塩を用いたリン酸塩類の分別定量法の開発

    1992.4 - 1993.3

    System name:科学研究費助成事業

    Research category:奨励研究(A)

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    Grant type:Competitive

    Grant amount:\9000000 ( Direct Cost: \9000000 )

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  • Study on the Chemical Evolution of Groundwater in the Hydrological Cycle of a Limestone Area

    Grant number:03640497

    1991 - 1992

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for General Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    YOSHIMURA Kazuhisa, MATSUOKA Shiro, INOKURA Youji

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    Grant amount:\400000 ( Direct Cost: \400000 )

    On the basis of the topographic divide and the existence of two groundwater systems, the catchment basins in the Akiyoshi-dai Plateau limestone area(Yamaguchi Prefecture, Western Japan)are divided into six areas:Hirotani(where Akiyoshi-do Cave is located),Kanoide,Kuroiwa,Ono,Narutaki and Sowa. In this limestone area,groundwater flows out from 4 springs and 5 caves at the foot of the plateau. The origin of the dissolved components in the groundwater was estimated by using the self-consistent least squares method proposed by Tsurumi(1982). The contents of the dissolved components for all spring waters could be explained by the mixing of only three sources: one rich in limestone components,another in non-carbonate rock components,and the other in calcium sulfate probably originating from fallout and sulfur-oxidation in the soil in the plateau.
    With an area of 18.5km^2, the catchment basin of Akiyoshi-do Cave occupies about half of the Akiyoshi-dai Plateau, where the annual mean precipitation is 1,974mm,and the average run-off from Akiyoshi-do Cave is estimated to be 955 mm. The calcium concentration of the baseflow showed seasonal fluctuations,and followed changes in the soil's CO_2 partial pressure. Measured soil CO_2 in the humus soil varied from 0.15% at a soil temperature of 7.2゚C to1.7% at 19.0 ゚C, whereas in the meadows which cover most of the area,it ranged from 0.08% at 3.8゚C to 1.2% at 20.8゚C. The calcium concentration in groundwater issuing from the Akiyoshi-dai Plateau is controlled by the water-limestone dissolution equilibrium,under open system conditions depending on the meadow's soil CO_2 contents. A yearly average of 2,100tons of limestone was dissolved in groundwater issuing from Akiyoshi-do Cave,about 5% of which,of 110tons, was dissolved by acidic deposition.
    Ion-exchanger phase absorptiometry was applied to the flow analysis of trace amounts of copper. This method permitted a highly sensitive,selective determination of copper in karst groundwater samples without any preconcentration. By measuring the copper concentration response in the water after a storm,the infiltration rate of rain water from the soil zone to the underground river of this karst groundwater system could be evaluated to be about 10-20m day^<-1>. On the other hand,the tritium concentration response suggested that the faily long residence groundwater(about 40years)entered the groundwater system after a big storm.

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Teaching Experience

  • 自然環境科学研究演習

    2023
    Institution name:新潟大学

  • 薬品安全管理技術

    2023
    Institution name:新潟大学

  • 統合化学入門

    2023
    Institution name:新潟大学

  • 化学とSDGs

    2023
    Institution name:新潟大学

  • 安全工学基礎

    2023
    Institution name:新潟大学

  • 理学基礎演習

    2022
    Institution name:新潟大学

  • 卒業論文I

    2022
    Institution name:新潟大学

  • 卒業論文II

    2022
    Institution name:新潟大学

  • 自然環境科学特論B

    2022
    Institution name:新潟大学

  • 分析化学I

    2021
    Institution name:新潟大学

  • 課題研究B

    2021
    Institution name:新潟大学

  • 課題研究C

    2021
    Institution name:新潟大学

  • 専門力アクティブ・ラーニング

    2021
    Institution name:新潟大学

  • 自然科学総論V

    2021
    Institution name:新潟大学

  • 課題研究(自然環境)A

    2020
    Institution name:新潟大学

  • 卒業論文

    2020
    Institution name:新潟大学

  • 課題研究

    2020
    -
    2021
    Institution name:新潟大学

  • 卒業論文Ⅱ

    2020
    Institution name:新潟大学

  • 安全教育

    2020
    Institution name:新潟大学

  • 卒業論文Ⅰ

    2020
    Institution name:新潟大学

  • 環境経済システム論Ⅰ

    2019
    -
    2020
    Institution name:新潟大学

  • 自然環境科学総論

    2018
    Institution name:新潟大学

  • 自然環境科学実験C2

    2017
    Institution name:新潟大学

  • 自然環境科学実験C1

    2017
    Institution name:新潟大学

  • 課題研究B

    2017
    -
    2021
    Institution name:新潟大学

  • 専門力アクティブ・ラーニング

    2017
    -
    2021
    Institution name:新潟大学

  • 課題研究A

    2017
    -
    2021
    Institution name:新潟大学

  • 課題研究C

    2017
    -
    2021
    Institution name:新潟大学

  • 理学スタディ・スキルズ

    2017
    -
    2020
    Institution name:新潟大学

  • 環境科学スタディスキルズ

    2016
    Institution name:新潟大学

  • 日本事情自然系A

    2016
    Institution name:新潟大学

  • 課題研究(自然環境)

    2015
    -
    2016
    Institution name:新潟大学

  • 化学入門

    2014
    -
    2020
    Institution name:新潟大学

  • 自然科学実験法

    2014
    -
    2017
    Institution name:新潟大学

  • 研究発表演習Ⅰ(学外発表)

    2014
    Institution name:新潟大学

  • 自然科学総論Ⅴ

    2014
    Institution name:新潟大学

  • 環境科学特定演習Ⅰ

    2014
    Institution name:新潟大学

  • 化学基礎B

    2013
    Institution name:新潟大学

  • グリーンケミストリー入門

    2013
    -
    2022
    Institution name:新潟大学

  • 研究発表演習Ⅰ(中間発表)

    2012
    -
    2015
    Institution name:新潟大学

  • 環境科学セミナーⅠ

    2012
    -
    2015
    Institution name:新潟大学

  • 環境科学総合演習Ⅰ

    2012
    -
    2015
    Institution name:新潟大学

  • 環境科学特定研究Ⅰ

    2012
    -
    2014
    Institution name:新潟大学

  • チームインターンシップ Ⅰ

    2012
    -
    2013
    Institution name:新潟大学

  • チームインターンシップ Ⅱ

    2012
    -
    2013
    Institution name:新潟大学

  • 環境科学演習Ⅰ

    2012
    Institution name:新潟大学

  • 環境科学特定研究

    2012
    Institution name:新潟大学

  • 地球環境化学

    2011
    Institution name:新潟大学

  • グリーンケミストリー概説

    2010
    -
    2013
    Institution name:新潟大学

  • 環境化学特論Ⅱ

    2008
    Institution name:新潟大学

  • 基礎化学実験

    2008
    -
    2016
    Institution name:新潟大学

  • 環境化学要論I

    2007
    Institution name:新潟大学

  • 環境分析化学

    2007
    -
    2021
    Institution name:新潟大学

  • 自然環境科学実験C

    2007
    -
    2016
    Institution name:新潟大学

  • 自然環境科学概論C

    2007
    -
    2016
    Institution name:新潟大学

  • 地球科学

    2007
    -
    2011
    Institution name:新潟大学

  • 化学実験

    2007
    -
    2010
    Institution name:新潟大学

  • 環境化学特論II

    2007
    Institution name:新潟大学

▶ display all