核桃仁和山木耳中铜、锌的连续测定

食品科学 ›› 2005, Vol. 26 ›› Issue (3): 189-192.

核桃仁和山木耳中铜、锌的连续测定

居红芳

常熟理工学院化学系

出版日期:2005-03-15 发布日期:2011-09-19

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

JU Hong-Fang

Department of Chemistry, Changshu College

Online:2005-03-15 Published:2011-09-19

摘要/Abstract

摘要： 研究了在HCl—KSCN底液中用单扫描示波极谱法连续测定核桃仁和山木耳中铜、锌含量的方法。在此底液中,铜、锌分别在—0.42V(Vs.SCE)、—1.03V(Vs.SCE)处产生一敏锐的二阶导数波,检出限分别为0.005g/ml、0.01g/ml,线性范围分别为0.01～8.00g/ml,0.01～10.00g/ml。应用本方法测定了核桃仁和山木耳两种山珍中的铜、锌含量,回收率在96.4%～102.9%。此方法准确、简便、快速、灵敏度高。

关键词: 单扫描示波极谱法, 铜, 锌, 测定

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

居红芳. 核桃仁和山木耳中铜、锌的连续测定[J]. 食品科学, 2005, 26(3): 189-192.

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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