イオンクロマトグラフィーにおけるユニバーサル検出法  [in Japanese] Universal Detection Methods in Ion Chromatography  [in Japanese]

Access this Article

Search this Article

Author(s)

    • 戸田 敬 TODA Kei
    • 熊本大学大学院先端科学研究部基礎科学部門化学分野 Department of Chemistry, Kumamoto University

Abstract

<p>イオンクロマトグラフィーにおける検出では,イオンに対して応答する高感度な溶液導電率法が広く用いられている.溶液導電率法では,当量導電率がイオン種間で異なるため,原則として,測定対象イオンごとの検量線に基づいて定量する必要がある.他の多くの機器分析法においても測定対象物質の標準により校正して定量するが,測定値の精度は標準溶液の安定性,純度,精度に大きく依存する.測定対象物質の標準を必要としない定量法である"ユニバーサル検出法"は,標準を入手できない物質の定量を可能にし,また,簡便な多成分一斉分析を実現できる.イオンクロマトグラフィーでの測定対象は,電荷を持つ溶存イオンであり,電荷均衡を保ったまま,他のイオン種に交換可能な化学形である.この特徴的な現象であるイオン交換に基づくユニバーサル検出法が,数多く報告されている.本稿では,これまでに報告されたイオン交換に基づく手法をはじめ,新しいイオンのユニバーサル検出の試みについて紹介する.</p>

<p>Ion chromatography (IC) has been widely used with conductivity detection. Conductivity detection is semi-selective to the ionic solutes. The response of conductivity detection depends on limiting equivalent ionic conductances, which are different for various kinds of ions. Most of the analytical instruments, including IC, required a calibration procedure with an analyte standard. The accuracy of the results depends on the quality, stability and purity of the standard. The universal detection, which is the way to quantify without an analyte standard, is an ideal way on the chemical analysis because it can achieve the quantification of unavailable compounds and decrease the labor for preparing the standard especially for multiple quantifications on chromatography. In IC, many kinds of method for universal detection have been reported. Most of these are based on ion exchange. Ions are the chemical form which has a electrical charge. Ions can be exchanged to the other kinds of ions while keeping charge balances. This phenomena is important in universal detection with an indirect photometry, and replacement IC. Furthermore, direct universal detection has been achieved by the detection of charged aerosol, ionic charge, and carbon amounts on organic compounds. In the present review, these universal detection methods are introduced.</p>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 68(3), 153-162, 2019

    The Japan Society for Analytical Chemistry

Codes

  • NII Article ID (NAID)
    130007623962
  • NII NACSIS-CAT ID (NCID)
    AN00222633
  • Text Lang
    JPN
  • ISSN
    0525-1931
  • NDL Article ID
    029592172
  • NDL Call No.
    Z17-9
  • Data Source
    NDL  J-STAGE 
Page Top