微波消解-Nafion修饰电极溶出伏安法测定海带中的铅含量  

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

作　　者：李静[1] 李红波[1,2] 范大和[1] 王伟[1] 胡效亚[2] 

机构地区：[1]盐城工学院化学与生物工程学院,江苏盐城224051 [2]扬州大学化学化工学院,江苏扬州225002

出　　处：《食品科学》2011年第10期107-109,共3页Food Science

基　　金：国家自然科学基金面上项目(2087508121075107);盐城工学院自然科学基金项目(XKY2009009XKY2009010);盐城市科技项目(YK2009032)

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。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.

关 键 词：微波消解 溶出伏安法 NAFION 修饰电极 铅 

分 类 号：O657.1[理学—分析化学]