Chromotropic Acid as a Reagent for Ultra
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Zhiqiang Zhao; Ruomei Gao; Jingtian Li; Suran Liu; Hui Liu
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Article
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1998
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Elsevier Science
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English
β 68 KB
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