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Polarography as a tool in organic analysis. III

Determination of the azo group

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Summary

Rapid indirect polarographic and visual micro-methods have been developed for the determination of azo, azo and nitro, or azo and nitroso groups in the same solution. First, the azo group is reduced with titanium(III) at pH 1.7 and then the nitro group at pH 5.5. The excess of reductant is determined polarographically. Mixtures containing nitroso and azo groups are analysed by indirect polarography by reducing the nitroso group first in 7N acid and then the azo group at pH 5.

Zusammenfassung

Indirekte polarographische und visuelle Mikromethoden zur Bestimmung von Azogruppen, Azo- und Nitrogruppen, oder Azo- und Nitrosogruppen in derselben Lösung wurden ausgearbeitet. Zuerst wird die Azogruppe bei pH 1,7 mit Titan(III), dann die Nitrogruppe bei pH 5,5 reduziert. Der Überschuß des Reduktionsmittels wird polarographisch bestimmt. Gemische mit Nitroso-und Azogruppen lassen sich indirekt polarographisch analysieren, indem man zuerst die Nitrogruppe in 7-n Säure und dann die Azogruppe bei pH 5 reduziert.

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Authors and Affiliations

  1. National Research Center, Dokki, Cairo, U. A. R.

    G. M. Habashy, Y. A. Gawargious & S. W. Bishara

  2. The American University in Cairo, U. A. R.

    G. M. Habashy

Authors
  1. G. M. Habashy
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  2. Y. A. Gawargious
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  3. S. W. Bishara
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Habashy, G.M., Gawargious, Y.A. & Bishara, S.W. Polarography as a tool in organic analysis. III. Mikrochim Acta 57, 44–52 (1969). https://doi.org/10.1007/BF01216663

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  • DOI: https://doi.org/10.1007/BF01216663

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