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。
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 Cd^2＋ at about - 0.85 V. Nation concentration, bismuth film thickness, buffer solution pH, deposition potential accumulation time and other potential interference factors were investigated. A linear relationship was found between peak area and cadmium concentration over the range of 4.0 to 14.0 μg/L with a correlation coefficient of 0.9964. The limit of detection of the method was 0.2 μg/L. The sensor was highly sensitive and effective to detect cadmium even in the presence of several excess potential interference ions.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2011年第14期190-193,共4页
Food Science
基金
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)
关键词
微波消解
溶出伏安法
铋膜
NAFION
镉
microwave digestion
stripping voltammetry
bismuth
nation
cadmium
