A reagentless renewable N,N `-diphenyl-p-phenylenediamine loaded sensor for hydrogen sulfide

M Thompson, NS Lawrence, J Davis, L Jiang, TGJ Jones, RG Compton

    Research output: Contribution to journalArticle

    26 Citations (Scopus)

    Abstract

    The electrochemically induced reaction of sodium sulfide with N,N-1-diphenyl-p-phenylenediamine (DPPD) has been studied in aqueous solutions (pH 1-7) at glassy carbon (GC) electrodes. The DPPD indicator has been shown to form a thin film on the electrode surface capable of sensing sulfide at the triple phase boundary (DPPD/electrolyte/electrode) in the range 20-200 muM with a limit of detection of 18 muM. The low solubility of DPPD has been exploited further by incorporating the species in the design of a modified renewable carbon-epoxy electrode whereby the detection process can occur in an inexpensively constructed device suitable for single shot determinations. (C) 2002 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)33-40
    JournalSENSORS AND ACTUATORS B-CHEMICAL
    Volume87
    Issue number1
    Publication statusPublished - Nov 2002

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