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Kinetic study of the oxidation of indigocarmine by hydrogen peroxide with ferrous and ferric ions in acid medium

✍ Scribed by Luis M. Camarero; Roberto >Peche; Arancha Collado

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 128 KB
Volume: 29
Category: Article
ISSN: 0538-8066
DOI: 10.1002/(sici)1097-4601(1997)29:8<575::aid-kin2>3.0.co;2-r

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✦ Synopsis

The use of hydrogen peroxide in addition to ferrous and ferric salts has been shown an effective method in the decoloration of indigocarmine (IDS), Indigo-5,5Ј-disulfonic acid disodium salt.

The kinetic experiments control have been carried out by means of a conventional spectrophotometric technique. In acid medium and the initial absence of Fe ϩ2 , the decoloration process obeys the following rate law: Effects of reagents concentrations, temperature, and acidity on the rate experimental constant have been discussed. A feasible reaction mechanism is finally proposed. The rate equation deducted from the mechanism is according to the achieved experimental results.

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