Study on Water Quality Monitoring by Advanced Ion-Exclusion Chromatography

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  • TANAKA Kazuhiko
    National Institute of Advanced Industrial science and Technology Graduate School of Engineering, Chubu University Present address, Department of Development Science, Graduate School for International Development and Cooperation, Hiroshima University

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  • イオン排除型イオンクロマトグラフィーによる水質モニタリング法の開発に関する研究
  • イオン ハイジョガタ イオン クロマトグラフィー ニ ヨル スイシツ モニタリングホウ ノ カイハツ ニ カンスル ケンキュウ

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Abstract

Several advanced ion-exclusion chromatographic (IEC) methods for the determination of anions (sulfate, nitrate, and chloride ions), cations (sodium, ammonium, potassium, magnesium, and calcium ions), HCO3−, PO43−, and H3SiO4− were studied. The goal was to evaluate the environmental water quality of several locations using polymethacrylate-based ion-exchange resin columns and different types of eluents. Separation science was studied regarding a multifunctional separation mechanism based on ion-exclusion, cation-exchange, adsorption, simultaneous ion-exclusion/cation-exchange, and vacant ion-exclusion using IEC methods. They were applied to weakly acidic cation-exchange resin and weakly basic anion-exchange resin columns. Anions, cations, amines, carboxylic acids, and non-ionic substances are considered to be important for evaluating water quality. As a result, a high-speed simultaneous determination of anions and cations was achieved in a 5 min. when applying IEC with conductivity detection on a weakly acidic cation-exchange resin column by elution with tartaric acid-18-crown-6-water. Selective and highly sensitive IEC determination of HCO3− from strong acid anions was achieved when using a water eluent and enhanced conductivity detection. A selective, highly sensitive, and simultaneous determination of PO43− and H3SiO4− was achieved when using the water eluent and UV-detection at 370 nm. A highly sensitive and selective determination of ammonium ion from mono- and divalent cations was achieved when using IEC with the enhanced conductivity detection on a weakly basic anion-exchange resin column by elution with water. The effectiveness for these IEC methods was demonstrated in the applications to an environmental water quality monitoring of rain, river, and sea water. A performance evaluation was also conducted for a photocatalyst, such as titania to some organic, inorganic, and non-ionic substances.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 55 (5), 275-289, 2006

    The Japan Society for Analytical Chemistry

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