食品科学 ›› 2011, Vol. 32 ›› Issue (10): 107-109.doi: 10.7506/spkx1002-6630-201110024

• 分析检测 • 上一篇    下一篇

微波消解-Nafion修饰电极溶出伏安法测定海带中的铅含量

李 静,李红波,*,范大和,王 伟,胡效亚   

  1. 1.盐城工学院化学与生物工程学院 2.扬州大学化学化工学院
  • 出版日期:2011-05-25 发布日期:2011-04-08
  • 基金资助:
    国家自然科学基金面上项目(20875081;21075107);盐城工学院自然科学基金项目(XKY2009009;XKY2009010); 盐城市科技项目(YK2009032)

Microwave Digestion Followed by Stripping Voltammetric Determination of Lead in Kelp Using Nafion Modified Electrode

LI Jing1,LI Hong-bo1,2,*,FAN Da-he1,WANG Wei1,HU Xiao-ya2   

  1. 1. School of Chemistry and Biology Engineering, Yancheng Institute of Technology, Yancheng 224051, China; 2. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
  • Online:2011-05-25 Published:2011-04-08

摘要: 建立一种基于微波消解-Nafion修饰电极溶出伏安法用于检测海带中的铅离子。铅离子在-0.62V处出现了清晰的氧化峰。对Nafion的浓度、缓冲液的pH值、富集电位、富集时间及可能存在的干扰物质进行考察。铅离子在6.0~16.0μg/L范围内呈线性关系,线性相关性系数为0.9984,检出限为0.04μg/L。结果表明,该传感器在过量的干扰离子存在条件下,表现出超灵敏性和有效性。

关键词: 微波消解, 溶出伏安法, Nafion, 修饰电极,

Abstract: A stripping voltammetry method to determine lead in kelp was developed on a nafion modified electrode after microwave digestion. The oxidation peak of lead was well defined at -0.62 V. The influence factors nafion concentration, buffer pH, deposition potential, accumulation time and potential interferences were investigated. The sensor used exhibited linear behavior in the range of 6.0 to 16.0μg/L (0.9984 correlation coefficient) with a detection limit of 0.04μg/L. In addition, this sensor was ultrasensitive and effective even in the presence of several excess potential interfering ions.

Key words: microwave digestion, stripping voltammetry, nafion, modified electrode, lead

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