2001•Analytical LaboratoryRequires access

Catalytic kinetic spectrophotometric determination of trace chromium(VI)

Bi Shao

Abstract

A new catalytic method for determination of chromium was studied. Chromium(Ⅵ) could catalyze the decolorizing oxidation of rhodamine B by hydrogen peroxide in weak acid medium. The linear range of determination of Cr(Ⅵ) is 0～3 5 μg/25 mL Cr(Ⅵ) with detection limit of 1 4 μg·L -1 . The method was used to determine trace Cr(Ⅵ) in electroplating wastewater with satisfactory results.

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Key concepts: Chemistry, Chromium, Detection limit, Hydrogen peroxide, Catalysis, Rhodamine B, Linear range, Electroplating