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New colorimetric applications of the chromate- o-dianisidine system

Buscaróns, F. ; Artigas, J. ; Rodriguez-Roda, C.

Analytica chimica acta, 1960, Vol.23, p.214-216 [Periódico revisado por pares]

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Título:
New colorimetric applications of the chromate- o-dianisidine system
Autor: Buscaróns, F. ; Artigas, J. ; Rodriguez-Roda, C.
É parte de: Analytica chimica acta, 1960, Vol.23, p.214-216
Descrição: New methods for the indirect colorimetric determination of antimony(III), hyposulfite, hydrazine, hydroxylamine and hydrogen peroxide, based on the colour reaction between chromate and o-dianisidine are described. The substance is oxidized with a known excess of chromate and the excess is determined by measuring at 470 mμ the extinction of the red complex with o-dianisidine at p h 1.5. The methods are simple, rapid and applicable at very low concentrations (0.1–4 μg/ml). Une nouvelle méthode est décrite pour le dosage colorimétrique indirect d'antimone(III), hyposulphite, hydrazine, hydroxylamine et peroxyde d'hydrogène. Cette méthode consiste à oxyder les substances à analyser par un excès de chromate de potassium, que l'on détermine ensuite colorimétriquement par l' o-dianisidine. Es wird eine Methode beschrieben zur indirekten kolorimetrischen Bestimmung von Antimon(III), Hyposulfit, Hydrazin, Hydroxylamin und Wassertoffperoxyd. Die zu untersuchende Substanz wird mit einem Überschuss von Kaliumchromat behandelt und dieser anschliessend mit o-Dianisidin kolorimetrisch bestimmt.
Editor: Elsevier B.V
Idioma: Inglês

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