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Kinetic method for the determination of mercury at the nanogram level using an iodide-catalyzed arsenitecerium reaction

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Summary

A kinetic method for the determination of mercury has been developed by using the iodide-catalyzed reaction between arsenite (III) and cerium (IV). The difference in reaction rate due to inhibition by mercury was measured spectrophotometrically at 275 nm. Optimum reaction conditions were investigated in order to obtain a greater sensitivity in the determination of mercury. The described procedure can be used satisfactorily for samples containing mercury in the 1 to 60 ng range, with an overall error of less than 5 %.

Zusammenfassung

Eine kinetische Methode zur Quecksilberbestimmung mit Hilfe der jodkatalysierten Reaktion zwischen Arsenit und Cer(IV) wurde ausgearbeitet. Der infolge der Hemmung durch Quecksilber eintretende Unterschied im Reaktionsablauf wurde spektrophotometrisch bei 275 nm gemessen. Die optimalen Reaktionsbedingungen wurden untersucht, um größere Empfindlichkeit bei der Quecksilberbestimmung zu erzielen. Die beschriebene Arbeitsweise kann mit zufriedenstellendem Erfolg für Proben angewendet werden, die 1–60 ng Hg enthalten. Der Fehler ist durchwegs geringer als 5%.

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Authors and Affiliations

  1. Department of Chemistry, University of Windsor, Windsor 11, Ontario, Canada

    P. J. Ke & R. J. Thibert

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  1. P. J. Ke
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Ke, P.J., Thibert, R.J. Kinetic method for the determination of mercury at the nanogram level using an iodide-catalyzed arsenitecerium reaction. Mikrochim Acta 60, 768–783 (1972). https://doi.org/10.1007/BF01239144

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  • DOI: https://doi.org/10.1007/BF01239144

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