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    Response of a copper (II) and iron (III) ion-selective electrode bielectrode array in saline media

    20865_downloaded_stream_321.pdf (280.4Kb)
    Access Status
    Open access
    Authors
    De Marco, Roland
    Martizano, Jay
    Date
    2008
    Type
    Journal Article
    
    Metadata
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    Citation
    De Marco, Roland and Martizano, Jay. 2008. Response of a copper (II) and iron (III) ion-selective electrode bielectrode array in saline media. Talanta 75 (5): 1234-1239.
    Source Title
    Talanta
    DOI
    10.1016/j.talanta.2008.01.018
    Faculty
    Nanochemistry Research Centre
    School
    Nanochemistry Research Institute (Research Institute)
    Remarks

    Copyright 2008 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/21552
    Collection
    • Curtin Research Publications
    Abstract

    A bielectrode array comprising a jalpaite membrane (i.e., Ag1.5Cu0.5S) copper(II) ion-selective electrode (ISE) and chalcogenide glass membrane (i.e., Fe2.5(Se60Ge28Sb12)97.5) iron(III) ISE has been assembled by individually wiring each solid-state sensor into a single electrode body.Furthermore, a dual metal ion buffer calibration standard incorporating copper(II) and iron(III) coordinating ligands to regulate the levels of free copper(II) and iron(III) in the buffer has been developed to enable simultaneous calibration of the bielectrode ISE array. In this work, the bielectrodeISE array has been employed in the continuous flow analysis (CFA) of free copper(II) and iron(III) in seawater media. It is shown that the individual electrodes displayed Nernstian response in the metal ion buffer calibration standard over a wide dynamic range (viz., 10-15 to 10-5M aCu2+ and10-21 to 10-11M aFe3+), and the results of repetitive CFA analyses of free copper(II) and iron(III) in seawater are commensurate with the typical values found in coastal seawater samples. Clearly, the bielectrode ISE array may be used in the simultaneous analysis of free copper(II) and iron(III)in seawater without fear of cross-interference between the solid-state sensors.

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