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Simultaneous determination of chlorine, bromine, and iodine in organic materials

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Summary

A simple method is described for the simultaneous determination of chlorine, bromine, and iodine when present together in an organic material. The sample is combusted in a closed flask containing hydrazine sulfate, and contents transferred quantitatively to a volumetric flask. One aliquot is titrated directly for iodide content. Another equal aliquot is treated with acidic K2Cr2O7 and boiled to remove I2; the remaining contents are then titrated for chloride and bromide. An accuracy of ±0.33% was obtained for Cl, ±0.39% for Br, and ±0.26% for I. Binary mixtures can be sequentially titrated without pretreatment.

Zusammenfassung

Eine einfache Methode zur gleichzeitigen Bestimmung von Chlor, Brom und Jod in organischer Substanz wurde beschrieben. Die Probe wird im geschlossenen Kolben über Hydrazinsulfat verbrannt. Der Inhalt wird dann quantitativ in einen Meßkolben gebracht. Ein aliquoter Anteil wird unmittelbar zur maßanalytischen Jodidbestimmung verwendet. Ein weiterer Anteil wird mit saurem Bichromat erhitzt, um das Jod zu entfernen. In der so behandelten Lösung titriert man dann Chlor und Brom. Die Genauigkeit der Bestimmung beträgt ±0,33% für Chlor, ±0,39% für Brom und ±0,26% für Jod. Binäre Gemische können ohne weitere Vorbehandlung titriert werden.

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Authors and Affiliations

  1. Central Analytical Department, Olin Corporation, New Haven, Conn.

    Robert C. Rittner &  T. S. Ma

  2. Department of Chemistry, City University of New York, Brooklyn, N. Y., USA

    Robert C. Rittner &  T. S. Ma

Authors
  1. Robert C. Rittner
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  2. T. S. Ma
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Rittner, R.C., Ma, T.S. Simultaneous determination of chlorine, bromine, and iodine in organic materials. Mikrochim Acta 65, 243–248 (1976). https://doi.org/10.1007/BF01217831

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  • DOI: https://doi.org/10.1007/BF01217831

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