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Evaluation of experimental conditions on the response of fluoride and cyanide selective electrodes in flow injection potentiometry

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Summary

The response of fluoride and cyanide selective electrodes has been investigated under steady-state and flow injection measuring conditions. Response time measurements indicate that at lower concentration levels of these ions the surface condition for both sensors is very critical; the choice of flow cell geometry, however, is of minor importance. An acetate buffer without CDTA is proposed for fluoride determinations because of better long term stability of response time of the fluoride ISE. Problems associated with the corrosion of the AgI-membrane when applied in a flow cell with wall-jet configuration are discussed.

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Authors and Affiliations

  1. Institut für Anorganische und Analytische Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-1000, Berlin 12

    Olaf Elsholz & Cheng-Yu Liu

  2. Institut für Technischen Umweltschutz, Fachgebiet Luftreinhaltung, Technische Universität Berlin, Strasse des 17. Juni 135, D-1000, Berlin 12

    Wolfgang Frenzel

  3. Tecator AB, Box 70, S-26301, Höganäs, Sweden

    Jürgen Möller

Authors
  1. Olaf Elsholz
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  2. Wolfgang Frenzel
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  3. Cheng-Yu Liu
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  4. Jürgen Möller
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Dedicated to Prof. Dr. G. Schulze on the occasion of his 60th birthday

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Elsholz, O., Frenzel, W., Liu, CY. et al. Evaluation of experimental conditions on the response of fluoride and cyanide selective electrodes in flow injection potentiometry. Fresenius J Anal Chem 338, 159–162 (1990). https://doi.org/10.1007/BF00321880

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  • DOI: https://doi.org/10.1007/BF00321880

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