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《ANALYTICAL LABORATORY》 1994-06
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Catalytic Kinetic Spectrophotometric Determination of Trace Copper(Ⅱ)

Miao Jigen(Department of Chemistry,Zhejiang NormalUniversity,Jinha 321004)Cai Ruxiu and Zeng Yun'e(Department of Chemistry,Wuhan University)  
new catalytic kinetic spectrophotometricmethod for the determination of trace copper(Ⅱ)based on catalytic effect of Cu(Ⅱ)on the decolorizingreaction resulted from the reduction ofdichlofobromoarsenazo with ascorbic acid has beeninvestigated.The order of the reaction and theapparent activation energy have been determined andthe reaction mechanism has been discussed.Thedetection limit is 7.6 ×10 ̄(-12)g/mL and linear range is0~60ng/10mL. The method has been applied to thedetermination of copper in samples with satisfactoryresults and the relative standard deviation is 2.0~2.9%。
【CateGory Index】: O614.121
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