The electrochemical analog of the methylene blue reaction: A novel amperometric approach to the detection of hydrogen sulfide

NS Lawrence, J Davis, L Jiang, TGJ Jones, SN Davies, RG Compton

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    Abstract

    The electrochemical oxidation of N,N-dimethylphenylenediamine at glassy carbon electrodes in aqueous solution in the pH range 3-6 is shown to lead to currents which are considerably amplified in the presence of dissolved hydrogen sulfide. The mechanism of the electrode process is investigated and the reaction is shown to provide an attractive basis for the amperometric sensing of sulfide with an accessible range of ca. 3 to 150 muM (0.1 to 4.8 ppm).
    Original languageEnglish
    Pages (from-to)1453-1460
    JournalElectroanalysis
    Volume12
    Issue number18
    Publication statusPublished - Dec 2000

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