Determination of Trace Copper in Natural Water by Fluororoetry

Abstract

Abstract: A new method based on fluorescence quenching for determination of trace copper is reported,8-anilino-1-naphthalenesulfoic acid(ANS) is an important fluorescence probe. It can combine with polyethyleneimine- and makes an increase of quantum efficiency of fluorescence. Copper combines with polyethyleneimine to form strong complex. ANScan be bound to cationic copper-polyethyleneimine polymer as an ion pair. On the polymer the paramagnetic copper ion causes fluorescence to be quenched. These reactions can be applied to determining the trace copper in natural water after separation and preconcentration by sulfhydryl cotton fiber. The detection limit is 4.7 ppb. The relative standard error is not higher than 2.0% for determination of copper in range of 5 to 100ppb.

Key words: Fluorometry, Copper, Trace analysis

TrendMD:

Zhang Luduan, Liu lianqing, Zhang Zhujun . Determination of Trace Copper in Natural Water by Fluororoetry[J]. Chem. J. Chinese Universities, 1988, 9(5): 516.

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Determination of Trace Copper in Natural Water by Fluororoetry

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