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Position: Home > Articles > Determination of Cadmium in Eel by Microwave Digestion Followed by Stripping Voltammetry on Bismuth/Nafion Modified Electrode FOOD SCIENCE 2011,32 (14) 190-193

微波消解-铋膜/Nafion修饰电极溶出伏安法测定鳗鱼中的镉含量

作  者:
李静;李红波;范大和;王伟
单  位:
盐城工学院化学与生物工程学院;扬州大学化学化工学院
关键词:
微波消解;溶出伏安法;铋膜;Nafion;镉
摘  要:
运用铋膜/Nafion修饰电极耦合微波消解技术测定鳗鱼中的Cd2+。Cd2+在-0.85V处出现清晰的方波氧化峰。Nafion、铋膜的厚度、缓冲液的pH值、富集电位、富集时间及可能干扰物质的影响因素进行考察。Cd2+在4.0~14.0μg/L质量浓度范围内线性关系,线性相关性系数为0.9964,检出限为0.2μg/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。
译  名:
Determination of Cadmium in Eel by Microwave Digestion Followed by Stripping Voltammetry on Bismuth/Nafion Modified Electrode
作  者:
LI Jing1,LI Hong-bo1,2,FAN Da-he1,WANG Wei1(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)
关键词:
microwave digestion;stripping voltammetry;bismuth;nafion;cadmium
摘  要:
A stripping voltammetric method based on microwave digestion was developed for determining cadmium in eel on a bismuth/nafion modified electrode.Oxidation yield a well-defined square wave peak for Cd2+ at about-0.85 V.Nafion concentration,bismuth film thickness,buffer solution pH,deposition potential accumulation time and other potential interfer-ence factors were investigated.A linear relationship was found between peak area and cadmium concentration over the range of 4.0 to 14.0μg/L with a correlation coefficient of 0.9964.The limit of detection of the method was 0.2μg/L.The sensor was highly sensitive and effective to detect cadmium even in the presence of several excess potential interference ions.

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