Abstract
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 × 104liters·mol−1cm−1. The detection limit is 0.024 μg ml−1Cr. 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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