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New spot tests for thallium(I), bismuth(III), and iodide

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Summary

New spot tests are described for the selective detection of Tl(I), Bi(III), and I− ions, with limits of detection 4 μg, 5 μg, and 15 μg respectively, and limits of dilution 1∶12500, 1∶10000, and 1∶3300 respectively. Tests are also described for the direct detection of Tl(I) in the presence of Bi(III), and for Bi(III) in the presence of I−. These tests are based on the formation of a red or red-orange precipitate of “thallium bismuth iodide”. Most cations and anions, as well as thiourea, hydrazine, and hydrogen peroxide do not interfere. Only Ag(I), Pd(II), Pt(IV), NO2 −, IO3 −, IO4 −, MnO4 −, S2O3 2− and EDTA interfere.

Zusammenfassung

Neue Tüpfelreaktionen für den selektiven Nachweis von Tl(I), Bi(III) und Jodid mit Erfassungsgrenzen von 4, 5 bzw. 15 μg und Grenzkonzentrationen von 1∶12500, 1∶10000 bzw. 1∶3300 wurden beschrieben. Diese auch zum Nachweis von Tl(I) in Gegenwart von Bi(III) und von Bi(III) in Gegenwart von J− geeigneten Reaktionen beruhen auf der Bildung eines roten oder rot-orangen Niederschlages von Thalliumwismutjodid. Die meisten Kationen und Anionen sowie Thioharnstoff, Hydrazin und Wasserstoffperoxid stören nicht. Hingegen stören Ag, Pd(III) Pt(IV), NO2 −, JO3 −, JO4 −, MnO4 −, S2O3 2−- und ÄDTA.

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Authors and Affiliations

  1. The Department of Chemistry, Vikramajit Singh Sanatan Dharma College, 208002, Kanpur, India

    G. S. Johar

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  1. G. S. Johar
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Johar, G.S. New spot tests for thallium(I), bismuth(III), and iodide. Mikrochim Acta 63, 19–23 (1975). https://doi.org/10.1007/BF01271518

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  • DOI: https://doi.org/10.1007/BF01271518

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