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    Thin layer coulometric determination of nitrate in fresh waters

    Access Status
    Fulltext not available
    Authors
    Sohail, M.
    De Marco, Roland
    Lamb, K.
    Bakker, E.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Sohail, M. and De Marco, R. and Lamb, K. and Bakker, E. 2012. Thin layer coulometric determination of nitrate in fresh waters. Analytica Chimica Acta. 744: pp. 39-44.
    Source Title
    Analytica Chimica Acta
    DOI
    10.1016/j.aca.2012.07.026
    ISSN
    0003-2670
    School
    Department of Chemistry
    URI
    http://hdl.handle.net/20.500.11937/26104
    Collection
    • Curtin Research Publications
    Abstract

    A nitrate ion-selective electrode (ISE) employing a permeable tubular membrane impregnated with a conventional ISE cocktail has been used successfully in the coulometric analysis of nitrate in fresh waters. The liquid ISE membrane comprising a nitrate ionophore [tridodecylmethylammonium nitrate (TDMAN)], lipophilic electrolyte [tetradodecyl-ammoniumtetrakis(4-chlorophenyl)borate (ETH 500)] and plasticizer [bis(3-ethyl-hexyl)sebacate (DOS)] was supported on a porous polypropylene tube. Coulometric analysis with the tubular membrane ISE showed that nitrate could be detected in the range 10-100µM with a precision of 2.3% relative standard deviation (RSD), limit of detection of 1.1µM and relative accuracy of 4.4% compared to a certified reference material (CRM) Lake sample.

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