Elution characteristics of cations in serial connection of a cation exchange column and an anion exchange column.

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  • DING Mingyu
    Department of Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University
  • SUZUKI Yoshihito
    Department of Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University
  • KOIZUMI Hitoshi
    Department of Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University

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Other Title
  • 陰イオン交換カラムと陽イオン交換カラムとを直列したときの陽イオンのイオンクロマトグラフィーとその溶離特性
  • インイオン コウカン カラム ト ヨウイオン コウカン カラム ト オ チョク

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Description

The elution characteristics of cations (Na+, NH4+, K+, Mg2+, Ca2+) in a serial column method is studied. Three peaks are observed for each cation when an anion exchange column (Yokogawa, ICS-A23, 4.6 mm i.d.×75 mm) is connected to the back of a cation exchange column (Yokogawa, ICS-C25, 4.6 mm i.d.×125 mm) and a mixture of tartaric acid (TA) and 2, 6-pyridinedicarboxylic acid (PDC) is used as eluent. The first peak was caused by elution of the cation and the depletion of eluent ion (H+) in the eluent. Bacause the anions in the eluent (TA and PDC) form ion pairs or complexes with cations, the concentration of TA and PDC in the eluent were reduced when the cations were eluted from cation exchange resin. Thereby TA and PDC eluted from the cation exchange column were retained on the anion exchange resin by an ion exchange or distribution mechanism. Consequently, the second and third peaks have appeared corresponding to the depletion of TA and PDC anion in eluent, respectively.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 43 (2), 117-123, 1994

    The Japan Society for Analytical Chemistry

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