基于多壁碳纳米管/Nafion修饰电极的溶出伏安法测定大豆和大米重金属铅含量  

Determination of heavy metal lead in soybean and rice use a multi-walled carbon nanotube/Nafion modi⁃fied electrode by stripping voltammetry

作　　者：王忠政 洪琦[1] WANG Zhong-zheng;HONG Qi(School of life Science,Hubei University,Wuhan 430062,China;Oil Crops Research Institute,Chinese Academy of Agricultural Science,Wuhan 430062,China;Quality Inspection and Test Center for Oilseeds Products,Ministry of Agriculture and Rural Affairs,Wuhan 430062,China)

机构地区：[1]湖北大学生命科学学院,湖北武汉430062 [2]中国农业科学院油料作物研究所,湖北武汉430062 [3]农业部油料及制品质量监督检验测试中心,湖北武汉430062

出　　处：《中国油料作物学报》2020年第3期350-355,共6页Chinese Journal of Oil Crop Sciences

摘　　要：建立了一种测定大豆和大米中重金属铅含量的多壁碳纳米管/Nafion溶出伏安方法。该方法对重金属铅的线性方程为y=4.66x+46.19,相关系数为0.994,线性范围0.1~20.0μmol/L。实际样品测试中多壁碳纳米管/Nafion材料对大豆中铅的样品回收率为99.50%~100.37%,相对标准偏差小于5.36%;对大米中铅的回收率为98.75%~101.25%,相对标准偏差小于5.63%。该方法可适用于大豆和大米为主的粮油产品中重金属铅的检测,为加强食品安全保障提供技术支撑。A multi-walled carbon nanotube/Nafion modified electrode for determination of heavy metal ion lead in soybean and rice by stripping voltammetry was established.The linear regress equation was y=4.66x+46.19,with correlation coefficient of 0.994.The detection limit was in the range of 0.1~20μmol/L.The recoveries of lead in the soybean were in the range of 99.50%~100.37%,with RSD less than 5.63%.The recoveries of lead in the rice were in the range of 98.75%~101.25%,with RSD less than 5.63%.The method was applied to the detection of heavy metal ion lead in soybean and rice.It has safeguard effect to grain and oil products.

关 键 词：多壁碳纳米管 Nafion分散液 重金属铅 粮油产品 

分 类 号：S-3[农业科学]