Derivatized carbon powder electrodes: reagentless pH sensors

Henry C. Leventis, Ian Streeter, Gregory G. Wildgoose, Nathan S. Lawrence, Li Jiang, Timothy G. J. Jones, Richard G. Compton

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    Abstract

    The authors derivatize C powder with anthracene, azobenzene, diphenylamine, 9,10-diphenylanthracene, methylene blue, 3-nitrofluoranthene, 6-nitrochrysene, 9-nitroanthracene, 9,10-phenanthraquinone (PAQ), thionin, and fast black K (2,5-dimethoxy-4-[(4-nitrophenyl)azo]benzenediazonium chloride) and sep. immobilize the resulting material onto a bppg electrode. The authors use cyclic voltammetry (CV) to demonstrate that the obsd. voltammetric response for each derivatized C is consistent with that of an immobilized species. Further, the authors use CV and square wave voltammetry (SWV) to study the effect of pH on the peak potentials of each compd. studied over the range pH 1-12 and at elevated temps. up to 70° to demonstrate the versatility of derivatized C electrodes as reagentless pH sensors. [on SciFinder(R)]
    Original languageEnglish
    Pages (from-to)1039-1051
    Number of pages13
    JournalTalanta
    Volume63
    Early online date1 Apr 2004
    DOIs
    Publication statusPublished - 8 Jul 2004

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