2004•Metallurgical AnalysisRequires access

Study on catalytic kinetic spectrophotometric determination of trace copper with hydrogen peroxide and safranine O

Zhuang Hui-rong

Abstract

A new catalytic spectrophotometric method for the determination of trace amounts of copper was developed.The method is based on catalysing effect of copper on decoloring reaction of safranine O oxidized by hydrogen peroxide in NH_3·H_2O-NH_4Cl medium.The optimum conditions and the kinetic parameters were studied.The linear range is 0.015～6 ng/mL for copper with detection limit of 0.15 ng/mL.The method has been applied to the determination of trace amounts of copper in distilled water and NaOH samples with satisfactory results.

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Key concepts: Copper, Hydrogen peroxide, Detection limit, Catalysis, Chemistry, Distilled water, Trace Amounts, Spectrophotometry