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Simultaneous microdetermination of iodine and chlorine or iodine and bromine in organic compounds

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Summary

A micromethod for simultaneous determination of iodine and chlorine or iodine and bromine in organic compounds is described. After combustion in an oxygen-filled separatory funnel containing acidic sodium nitrite, iodine is produced, separated by carbon tetrachloride and oxidised with bromine water to iodate. After removal of carbon tetrachloride and excess bromine, the iodate is determined iodometrically. The aqueous combustion product is determined mercurimetrically for either chlorine or bromine. The average recoveries are 98.7%, 100.7% and 100.6% with iodine, chlorine and bromine in mixtures of their organically bounded compounds respectively. Microdetermination of iodine in presence of other halogens using sodium nitrite as absorbing agent andLeipert's method is described.

Zusammenfassung

Eine Mikromethode zur gleichzeitigen Bestimmung von J und Cl oder J und Br in organischen Verbindungen wurde beschrieben. Nach der Verbrennung in einem sauerstoffgefüllten Scheidetrichter in Anwesenheit angesäuerter Natriumnitritlösung wird Jod freigesetzt, mit Tetrachlormethan extrahiert und mit Bromwasser zu Jodat oxydiert. Nach Entfernung des Tetrachlorkohlenstoffs und des Bromüberschusses wird das Jodat jodometrisch titriert. In der wäßrigen Lösung wird mercurimetrisch Chlor bzw. Brom bestimmt. Die durchschnittliche Ausbeute beträgt 98,7, 100,7% und 100,6% für Jod, Chlor bzw. Brom in Gemischen ihrer organischen Verbindungen. Die Mikrobestimmung des Jods in Gegenwart anderer Halogene nach Absorption in Nitritlösung nach der Methode vonLeipert wurde beschrieben.

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Authors and Affiliations

  1. Microanalytical Research Laboratories, Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, Egypt

    S. S. M. Hassan & M. B. Elsayes

Authors
  1. S. S. M. Hassan
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  2. M. B. Elsayes
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Hassan, S.S.M., Elsayes, M.B. Simultaneous microdetermination of iodine and chlorine or iodine and bromine in organic compounds. Mikrochim Acta 60, 115–121 (1972). https://doi.org/10.1007/BF01229938

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  • DOI: https://doi.org/10.1007/BF01229938

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