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Kinetic-potentiometric determination of copper in real samples with a new antimony(V) ion-selective electrode

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  • Electrochemical Analysis
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Summary

A sensitive and selective kinetic method for the determination of copper is proposed. It is based on the catalytic effect of copper on the reaction between hexachloroantimonate(V) and hydroxylamine at pH 4.4 (acetic-acetate buffer). The rate of the reaction is potentiometrically monitored with a new antimony(V) ion-selective electrode using 1,2,4,6-tetraphenyl-pyridinium hexachloroantimonate(V) as electroactive material in a poly-(vinyl chloride) membrane. The proposed method allows the determination of copper(II) concentrations in the 5–510 ng ml−1 range, with a variation coefficient of 3.5%. The method has satisfactorily been applied to a variety of real samples.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Faculty of Sciences, University of Murcia, E-30071, Murcia, Spain

    C. Sánchez-Pedreño, J. A. Ortuño & J. Martinez-Ródenas

Authors
  1. C. Sánchez-Pedreño
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  2. J. A. Ortuño
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  3. J. Martinez-Ródenas
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Sánchez-Pedreño, C., Ortuño, J.A. & Martinez-Ródenas, J. Kinetic-potentiometric determination of copper in real samples with a new antimony(V) ion-selective electrode. Fresenius J Anal Chem 344, 100–103 (1992). https://doi.org/10.1007/BF00325122

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  • DOI: https://doi.org/10.1007/BF00325122

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