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Tast polarographic determination of Thorium(IV) by means of substitution reduction of Bismuth(III)-ethylenediaminetetraacetate chelate

Tast-Polarographische Bestimmung von Thorium(IV) mit Hilfe der Substitutionsreduktion des Wismut(III)-Äthylendiamintetraacetat-Chelats

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Zusammenfassung

Thorium(IV) erleichtert die Reduktion des Wismut(III)-ÄDTE-Chelats in schwach sauerem Medium und gibt eine neue Welle bei positiverem Potential, da das durch die Reduktion freigesetzte ÄDTE-Anion vom Thorium(IV)-Ion sofort ergriffen wird. Die Höhe der Substitutionsreduktionswelle ist zwischen 0,1 und 0,6 mM der Thorium(IV)-Konzentration proportional. Eigenschaften der Welle und der Elektrodenvorgang wurden untersucht.

Summary

Thorium(IV) facilitates the reduction of bismuth(III)-ethylenediaminetetraacetate chelate in weakly acidic medium and gives a new wave at a more positive potential, because the EDTA anion liberated by the reduction will be caught immediately by thorium(IV) ion. The height of the substitution reduction wave is proportional to the concentration of thorium(IV) between 0.1 and 0.6 mM. Properties of the wave and the electrode process were investigated.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Hokkaido University, 060, Sapporo, Japan

    M. Sugawara, Y. Murayama & T. Kambara

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  1. M. Sugawara
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  2. Y. Murayama
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  3. T. Kambara
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Sugawara, M., Murayama, Y. & Kambara, T. Tast polarographic determination of Thorium(IV) by means of substitution reduction of Bismuth(III)-ethylenediaminetetraacetate chelate. Z. Anal. Chem. 293, 104–106 (1978). https://doi.org/10.1007/BF00486984

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  • DOI: https://doi.org/10.1007/BF00486984

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