Successive Determination of Copper and Zinc in Walnut Kernel and Agaric by Single Scanning Oscillopolarography

Abstract

Abstract: A method for the determination of copper and zinc successively in two natural resources, walnut kernel and agaric by single scanning oscillopolarography with HCl-KSCN as base solution was described in this paper. In the base solution, two well-defined quadratic derivative waves at –0.42V(vs.SCE) and –1.03V(vs.SCE) were observed. The detection limits were: 0.005μg/ml for copper and 0.01μg/ml for zinc. The peak heights were linearly proportional to the concentration of copper over the range of 0.01～8μg/ml copper and 0.01～10μg/ml zinc. The method has been applied to the determination of copper and zinc in walnut kernel and agaric with recoveries in the range of 96.4%～102.9%. This method was shown to be accurate, simple and fast with high selectivity.

Key words: single scanning oscillopolarography, copper, zinc, determination

JU Hong-Fang. Successive Determination of Copper and Zinc in Walnut Kernel and Agaric by Single Scanning Oscillopolarography[J]. FOOD SCIENCE, 2005, 26(3): 189-192.

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Successive Determination of Copper and Zinc in Walnut Kernel and Agaric by Single Scanning Oscillopolarography

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