2006•Journal of Northeast Dianli UniversityRequires access

Determination of Trace Chromium (III) by Catalytic Kinetic Spectrophotometry

Shuying Wang

Abstract

A new catalytic kinetic spectrophotometic method for the determination of trace chromium(Ⅲ) has been established.The method is based on the chromium(Ⅲ) catalyzes oxidation of methylene blue by hydrogen peroxide in acidic medium at pH4.The linear range of the determination is 0～40 μg/L.The detection limit is 1.3×10~(-10)g/mL.The method has been applied to the determination of trace chromium(Ⅲ) in water with satisfactory result.

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Key concepts: Chromium, Hydrogen peroxide, Methylene blue, Detection limit, Spectrophotometry, Catalysis, Linear range, Chemistry