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    The performance of differential pulse stripping voltammetry at micro-liquid-liquid interface arrays

    154413_154413.pdf (330.0Kb)
    Access Status
    Open access
    Authors
    Strutwolf, J.
    Scanlon, M.
    Arrigan, Damien
    Date
    2010
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Strutwolf, Jorg and Scanlon, Micheal and Arrigan, Damien. 2010. The performance of differential pulse stripping voltammetry at micro-liquid-liquid interface arrays. Electroanalytical Chemistry 641 (1/2): pp. 7-13.
    Source Title
    Electroanalytical Chemistry
    DOI
    10.1016/j.jelechem.2010.01.020
    ISSN
    15726657
    School
    Nanochemistry Research Institute (Research Institute)
    Remarks

    NOTICE: this is the author’s version of a work that was accepted for publication in Electroanalytical Chemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Electroanalytical Chemistry, Vol. 641 (2010) http://dx.doi.org/10.1016/j.jelechem.2010.01.020

    URI
    http://hdl.handle.net/20.500.11937/43212
    Collection
    • Curtin Research Publications
    Abstract

    Microporous silicon membranes were recently introduced to create hexagonally-patterned arrays ofmicro-scale interfaces between two immiscible electrolyte solutions (lITIES). In this report we presenta simulation study of the application of differential pulse stripping voltammetry (DPSV) using theselITIES arrays for ion sensing. Simulations showed that the stripping current for ion detection wasenhanced by use of relatively deep pores (i.e. a low pore aspect ratio) and a viscous organic phase. These factors decrease the speed of escape of the pre-concentrated ion from the organic side of the ITIES. The stripping current initially increased steeply with pre-concentration time but eventually reached a plateau. Experiments performed using a lITIES array with micropores of radius 26 lm, depth of 100 lm and with a gelified organic phase demonstrated the saturation of the stripping peak with increasing pre-concentration time for the DPSV detection of tetraethylammonium ion. The reasons for the saturations are discussed in terms of diffusion coefficients and depth of the micropores.

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