微分电位溶出法快速检测液态食品中的微量铅

Differential Potential Stripping Method for Rapid Detection of Trace Lead in Liquid Food

建立了硝酸提取-微分电位溶出法测定液态食品中铅含量.通过与国标所述前处理和检测方法所得数据比对,其回收率、精密度均在可接受范围内,证明其可能性.结果表明,该法测得铅标准溶液的标准曲线回归方程为:Y=3.436C+321,R^(2)=0.99913,其中线性范围为0.0000~400.0000μg/L.该法适用于快速检测日常生活中不同溶液状态的液态食品的铅含量.

A nitric acid extraction-differential potential stripping method was established to determine the lead content in liquid food.By comparing with the data obtained from the pre-processing and testing methods described in the national standard,the recovery rate and precision are within the acceptable range,which proves its possibility.The results show that the standard curve regression equation of the lead standard solution measured by this method is:Y=3.436C+321,R^(2)=0.99913,and the linear range is 0.0000~400.0000μg/L.This method is suitable for rapid detection of lead content in liquid foods in different solution states in daily life.