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Comparison between capillary electrophoresis and ion-chromatography for analysis of inorganic anions

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Abstract

Separation and detection of some selected inorganic anions with capillary electrophoresis are shown. The anions are separated in microbore capillaries (25 μm* 0.2 m) and detected with a UV-detector. Results are compared with the method of ion exchange chromatography. In consideration of the most important physical and chemical parameters an easy kind of computer simulation for such electropherograms was developed.

To get optimal results of separation and UV-detection in capillary electrophoresis some parameters of the device HPE 100, i.e. loading time in the electrokinetic sample injection mode and the running voltage are varied. The behaviour of absorption in the UV region of the chosen anions as well as the influence of pH values in retention behaviour are investigated. There is a simple way to calculate the electrophoretic mobilities from known retention times. Approximate limits of detection for all anions and for each technique are given.

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Author notes

  1. Lothar Dunemann

    Present address: Medizinisches Institut für Umwelthygiene an der Heinrich-Heine-Universität Düsseldorf, Auf,m Hennekamp 50, D-W-4000, Düsseldorf 1, Federal Republic of Germany

Authors and Affiliations

  1. Institute of Inorganic and Analytical Chemistry of the Technical University of Clausthal, Paul-Ernst-Strasse 4, D-W-3392, Clausthal-Zellerfeld, Federal Republic of Germany

    Jürgen Harms, Lothar Dunemann & Georg Schwedt

Authors
  1. Jürgen Harms
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  2. Lothar Dunemann
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  3. Georg Schwedt
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Harms, J., Dunemann, L. & Schwedt, G. Comparison between capillary electrophoresis and ion-chromatography for analysis of inorganic anions. Mikrochim Acta 108, 251–260 (1992). https://doi.org/10.1007/BF01242434

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  • DOI: https://doi.org/10.1007/BF01242434

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