Electrochemical manipulation of localised pH: application to electroanalysis

James Davis, Jonathan Cooper

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The electrochemical manipulation of the local pH at a polymer functionalised electrode has been achieved in order to enhance the electrochemical response to cationic analytes. The changes in pH have been shown to provide a method for significantly enhancing the analytical signal towards the model compounds, dopamine and p-aminophenol. The procedure was found to operate irrespective of the electrical properties of the film. The main requirement for this electroanalytical system is that the film contains acidic groups within the polymer backbone. In the carboxylic acid functionalised polypyrrole film studied here, the performance was found to be greatest when the bulk solution pH was less than the pKa of the acid groups. The mechanism attributed to the enhanced response is elucidated and the limitations of the technique are assessed.
    LanguageEnglish
    Pages13-17
    JournalJournal of Electroanalytical Chemistry
    Volume520
    Publication statusPublished - 22 Feb 2002

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    Polymers
    Carboxylic Acids
    Dopamine
    Electric properties
    Electrodes
    Acids
    polypyrrole
    4-aminophenol

    Cite this

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    title = "Electrochemical manipulation of localised pH: application to electroanalysis",
    abstract = "The electrochemical manipulation of the local pH at a polymer functionalised electrode has been achieved in order to enhance the electrochemical response to cationic analytes. The changes in pH have been shown to provide a method for significantly enhancing the analytical signal towards the model compounds, dopamine and p-aminophenol. The procedure was found to operate irrespective of the electrical properties of the film. The main requirement for this electroanalytical system is that the film contains acidic groups within the polymer backbone. In the carboxylic acid functionalised polypyrrole film studied here, the performance was found to be greatest when the bulk solution pH was less than the pKa of the acid groups. The mechanism attributed to the enhanced response is elucidated and the limitations of the technique are assessed.",
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    Electrochemical manipulation of localised pH: application to electroanalysis. / Davis, James; Cooper, Jonathan.

    In: Journal of Electroanalytical Chemistry, Vol. 520, 22.02.2002, p. 13-17.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Electrochemical manipulation of localised pH: application to electroanalysis

    AU - Davis, James

    AU - Cooper, Jonathan

    PY - 2002/2/22

    Y1 - 2002/2/22

    N2 - The electrochemical manipulation of the local pH at a polymer functionalised electrode has been achieved in order to enhance the electrochemical response to cationic analytes. The changes in pH have been shown to provide a method for significantly enhancing the analytical signal towards the model compounds, dopamine and p-aminophenol. The procedure was found to operate irrespective of the electrical properties of the film. The main requirement for this electroanalytical system is that the film contains acidic groups within the polymer backbone. In the carboxylic acid functionalised polypyrrole film studied here, the performance was found to be greatest when the bulk solution pH was less than the pKa of the acid groups. The mechanism attributed to the enhanced response is elucidated and the limitations of the technique are assessed.

    AB - The electrochemical manipulation of the local pH at a polymer functionalised electrode has been achieved in order to enhance the electrochemical response to cationic analytes. The changes in pH have been shown to provide a method for significantly enhancing the analytical signal towards the model compounds, dopamine and p-aminophenol. The procedure was found to operate irrespective of the electrical properties of the film. The main requirement for this electroanalytical system is that the film contains acidic groups within the polymer backbone. In the carboxylic acid functionalised polypyrrole film studied here, the performance was found to be greatest when the bulk solution pH was less than the pKa of the acid groups. The mechanism attributed to the enhanced response is elucidated and the limitations of the technique are assessed.

    M3 - Article

    VL - 520

    SP - 13

    EP - 17

    JO - Journal of Electroanalytical Chemistry

    T2 - Journal of Electroanalytical Chemistry

    JF - Journal of Electroanalytical Chemistry

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