Determination of Four Heavy Metal Elements in Rice by Microwave Digestion Inductively Coupled Plasma Mass Spectrometry
This article uses microwave digestion inductively coupled plasma mass spectrometry(ICP-MS)to determine four heavy metals,lead,cadmium,chromium,and arsenic,in rice,with the aim of optimizing the microwave digestion conditions in the pretreatment experiment.The results showed that with a digestion power of 1 600 W,a temperature gradient of 150～190℃,a total time of 40 minutes,a digestion acid system of HNO3(7 mL)+H2O2(2 mL),and an acid extraction temperature of 150℃,the rice sample could be completely digested,and the spiked recovery rate of the sample can reach the highest level.This method has the characteristics of high sensitivity and high accuracy,which can provide a reliable method reference for personnel engaged in heavy metal detection in rice.
microwave digestioninductively coupled plasma mass spectrometryriceheavy metal
万方数据
维普
