阳极溶出伏安法快速测定谷物中的镉含量

建立了一种阳极溶出伏安法快速测定谷物中的镉含量。样品经微波消解后，采用玻碳电极为工作电极，AgAgCl电极为参比电极，铂电极为对电极，测定谷物中镉含量，其检出限为0.4 μgL。采用标准加入法，平均回收率100%～104%；某一浓度样品同时测定6次，其变异系数2.43%。该方法稳定、快速和准确，可广泛用于粮食的安全事件应急监测。 

Determination of Cadmium Content in Grain by Anodic Stripping Voltammetry

An anodic stripping voltammetry method was established for fast determination of cadmium content in grain.Samples were dealt with microwave digestion，by using glassy carbon electrodes as working electrode，AgAgCl electrode as reference electrode and platinum electrode as counter electrode for determination of cadmium content in grain.The detection limit of method was 0.4 μgL.A standard adding method was used and average recovery rate was between 100% and 104%.A sample of a certain concentration was determined for 6 times，with a coefficient of variation of 2.43%.This method was stable，rapid and accurate，and could be widely used in emergency monitoring of food safety accidents.