几种淡水虾中铅镉含量的测定

食品科学 ›› 2005, Vol. 26 ›› Issue (7): 166-169.

几种淡水虾中铅镉含量的测定

汪学英, 卢祥云, 陈爱英

常熟理工学院化学系

出版日期:2005-07-15 发布日期:2011-09-19

Investigation on the Simultaneous Determination of Lead and Cadnium in North-East Crayfish by Catalytic Polarography

WANG Xue-Ying, LU Xiang-Yun, CHEN Ai-Ying

Department of Chemistry, Changshu Institute of Technology

Online:2005-07-15 Published:2011-09-19

摘要/Abstract

摘要： 在KI—HCl—H3PO4—抗坏血酸—酒石酸钠介质中,采用二阶导数示波极谱法可得Pb2+、Cd2+的灵敏极谱峰,波峰电位分别为-.53V和-0.67V。线性范围为0.02～6μg/ml[Pb（Ⅱ）]和0.01～4μg/ml[Cd（Ⅱ）]。最低检出限0.01μg/ml[Pb（Ⅱ）]和0.005μg/ml[Cd（Ⅱ）]。应用本法测定了几种常见淡水虾中的Pb2+、Cd2+的含量,回收率在90.2%～103.4%。实验结果表明:重金属离子的含量与虾生活的环境有关而与种类无明显相关关系,且虾各组织中重金属离子的含量也不同。

关键词: 催化示波极谱, 克氏原螯虾, 日本沼虾, Pb~(2+), Cd~(2+), 连续测定

Abstract: A catalytic polarographic method for simultaneous determination of lead and cadnium in the North-East crayfishwas described. In a base solution containing chlorhydnic acid-ascorbic acid-sodium tartrate-potassium iodied-phosphoric acid asensitive wave of lead and cadnium was obtained. The liner relationship between the concentration and their peak height were inthe range of 0.1～4μg/ml. The results indicate that there is no obviously relationship between the content of heavy metal ionsand the species but the living environment. The content of heavy metal ions in various crayfish tissues is different.

Key words: catalytic polarographic, crayfish, lead, cadnium, simultaneous determination

汪学英, 卢祥云, 陈爱英. 几种淡水虾中铅镉含量的测定[J]. 食品科学, 2005, 26(7): 166-169.

WANG Xue-Ying, LU Xiang-Yun, CHEN Ai-Ying. Investigation on the Simultaneous Determination of Lead and Cadnium in North-East Crayfish by Catalytic Polarography[J]. FOOD SCIENCE, 2005, 26(7): 166-169.

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