Sonoelectrochemically enhanced nitrite detection

J Davis, RG Compton

    Research output: Contribution to journalArticle

    110 Citations (Scopus)

    Abstract

    The determination of nitrite in homogenised egg was taken as particularly relevant for highlighting the beneficial aspects of sonoelectrochemical analysis in difficult matrices. The presence of high concentrations of protein and fat serve to foul the electrode and have traditionally prevented direct electrochemical probing of such matrices without recourse to substantial sample pre-treatment. To this end, power ultrasound (20 kHz) in combination with linear sweep techniques has been evaluated as a means of removing the need for sample manipulation beyond simple homogenisation. The electrochemical detection of nitrite was based on a nitroso-derivatisation reaction with reduction of the latter providing the analytical signal. The application of ultrasound is shown to significantly enhance the electrode response towards nitroso reduction with ultrasonically induced electrode cleaning providing a degree of signal resolution unattainable under silent conditions. The influence of electroactive egg constituents is detailed and a dual mode standard addition technique for negating such interferences is assessed. The reproducibility of the procedure is assessed with detected nitrite levels in egg found to be within MAFF limits. (C)2000 Elsevier Science B.V. All rights reserved.
    LanguageEnglish
    Pages241-247
    JournalAnalytica Chimica Acta
    Volume404
    Issue number2
    Publication statusPublished - Jan 2000

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    Nitrites
    Electrodes
    Ultrasonics
    Cleaning
    Fats
    Proteins

    Cite this

    Davis, J ; Compton, RG. / Sonoelectrochemically enhanced nitrite detection. In: Analytica Chimica Acta. 2000 ; Vol. 404, No. 2. pp. 241-247.
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    Davis, J & Compton, RG 2000, 'Sonoelectrochemically enhanced nitrite detection', Analytica Chimica Acta, vol. 404, no. 2, pp. 241-247.

    Sonoelectrochemically enhanced nitrite detection. / Davis, J; Compton, RG.

    In: Analytica Chimica Acta, Vol. 404, No. 2, 01.2000, p. 241-247.

    Research output: Contribution to journalArticle

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