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Über die Farbreaktion der Diaminophenole mit Oxydantien

Spektrophotometrische Untersuchungen

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Summary

A comparative study is presented on the oxydative effect of potassium dichromate, cerium(IV)-sulphate and vanadic acid on reduced dinitrophenols to form diaminophenols (2,4-dinitrophenol, 2-methyl-4,6-dinitrophenol and 2-sec. butyl-4,6-dinitrophenol).

The reduction and oxydation are studied for each oxidizing agent and for each dinitro compound. They are followed by spectral curves and by the control of time stability of the colour. The data obtained show that vanadic acid is superior to the other oxidants.

Zusammenfassung

Die oxydierende Wirkung, die drei verschiedene Oxydationsmittel [Kaliumdichromat, Cer(IV)-sulfat und Vanadium(V)-oxid] auf die zu Diaminophenolen reduzierten Dinitrophenole (2,4-Dinitrophenol, 2-Methyl-4,6-dinitrophenol und 2-sek.-Butylphenol) ausüben, wird untersucht.

Die Untersuchungen erstrecken sich in allen Fällen sowohl auf die Reduktions- als auch auf die Oxydationsphase. Die Form der Spektralkurven und die zeitliche Entwicklung der Farben werden beschrieben. Es zeigte sich, daß Vanadium(V)-oxid den anderen Oxydationsmitteln überlegen ist.

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Authors and Affiliations

  1. Chemisches Laboratorium für Pflanzenschutzmittel, Zentralinstitut für Landwirtschaftl. Forschung, Bukarest, Rumänien

    Alex. Polizu & Hildegard Greger

Authors
  1. Alex. Polizu
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  2. Hildegard Greger
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Polizu, A., Greger, H. Über die Farbreaktion der Diaminophenole mit Oxydantien. Z. Anal. Chem. 223, 247–260 (1966). https://doi.org/10.1007/BF00514863

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  • DOI: https://doi.org/10.1007/BF00514863

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