✦ LIBER ✦

Chromotropic Acid as a Reagent for Ultraviolet Spectrophotometric Determination of Hexavalent Chromium in Water

✍ Scribed by Zhiqiang Zhao; Ruomei Gao; Jingtian Li; Suran Liu; Hui Liu

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 68 KB
Volume: 58
Category: Article
ISSN: 0026-265X
DOI: 10.1006/mchj.1996.1460

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✦ Synopsis

A new ultraviolet spectrophotometric method for hexavalent chromium in water based on the oxidation of chromotropic acid by Cr(VI) in 0.12 mol/liter HCl medium is described. The molar absorptivity is 1.76 1 10 4 litersrmol 01 cm 01 . The detection limit is 0.024 mg ml 01 Cr. This sensitive and very simple ultraviolet spectrophotometric method for microquantitative determination of Cr(VI) in water has good precision and accuracy.

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