Development of hexafluoroarsenate(V) ion selective electrode and performances

Guo Xiong Zhang, Toshi Hiko Imato, Nobuhiko Ishibashi

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    A hexafluoroarsenate(V) ion selective PVC membrane electrode based on an ion pair of a lipophilic quaternary ammonium-hexafluoroarsenate is described. Three hexafluoroarsenate salts of tetradodecylammonium (TDA), triheptyldodecylammonium and trioctylmethylammomum ions are evaluated as an anion-exchange site. The TDA salt is estimated to give the best sensitivity. The linear response range of the electrode with a PVC membrane containing TDA-hexafluoroarsenate and di-2-(ethyl- hexyl)phthalate as a solvent mediator is from 10-2M down to 10-7M with a slope of 57~58 mV/decade at pH 2~12. The detection limit is 4X10-8M. The selectivity coefficients of the electrode for anions are determined by the mixed solution method. The electrode based on TDA-hexafluoroarsenate is superior with respects to sensitivity and selectivity to that based on tetradecylphosphonium-hexafluoroarsenate.

    Original languageEnglish
    Pages (from-to)283-285
    Number of pages3
    Journalbunseki kagaku
    Volume38
    Issue number6
    DOIs
    Publication statusPublished - 1989

    All Science Journal Classification (ASJC) codes

    • Analytical Chemistry

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