Determination of Trace Copper by Kin etic Spectrophotometry with P -acetylarsenazo

Abstract

Abstract: AnewKineticSpectrophotometrymethodforthedeterminationofcopperh asbeenestablished,inwhichp -acethlarsenazo was reducedto discolour by ascorbic acid inHAc -NaAc,wi th copper used as the catalyst andα,α-bipyridineastheactivator.Thekin eticconditionshavebeen studied.T hedetectionlimitofthemethodwas3.15×10-10 g /ml.Thelinearrangeofdeterminatio nwas 0.3～1.0μg /25ml for copper.Satisfactory results were abtained for the de-termination of copper in foodand water.

Key words: Kinetic spectophotmetry , Copper , P-acethlarsenazo

LUO Chuan-Nan, ZHOU Chang-Li, WEI Qin, GENG Yong-Qiang. Determination of Trace Copper by Kin etic Spectrophotometry with P -acetylarsenazo[J]. FOOD SCIENCE, 2002, 23(2): 110-112.

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Determination of Trace Copper by Kin etic Spectrophotometry with P -acetylarsenazo

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