粉剂类化妆品中铅含量检测预处理方法探讨

he pretreatment of cosmetics in detection of heavy metals is veary important for it can shift the sample into solution. The component of powder is quite different from those of ointment frost and latex.So the pretreatment of powder will be differ from others.This article compared some methods of pretreatment such as dry ashing, wet digestion and pressure tank digestion using ultrasonic and microwave as the assistant means. And we found that the method of pressure tank digestion with ultrasonic and microwave is much better than others with the recovery rate of 96％-104％.