化妆品中Hg、As和Pb的微波消解-氢化物发生ICP-AES法测定

Microwave Assisted Digestion-Hydride Generation ICP-AES Method for the Determination of Hg, As and Pb in Cosmetics

采用微波消解 -氢化物发生ICP-AES法测定化妆品中的Hg、As和Pb ,加入L_半胱氨酸消除了过渡金属离子的干扰 ,考察了微波消解、氢化物发生的最佳条件。建立的方法简便快速 ,测定Hg、As和Pb的RSD分别为0.59%、1.2%、2.4 % (n=10) ,样品加标回收率分别为98.5%、99.3 %和100.1 %。该法已应用于化妆品的常规测定 ,得到满意的结果。

A microwave assisted digestion-hydride generation ICP-AES method was established for the determination of Hg,As and Pb in cosmetics. The experimental conditions of microwave assisted digestion-hydride generation were optimized. The interference of transitional elements in cosmetics was eliminated by the addition of an appropriate amount of L _ cysteine. The recoveries of the method for Hg, As and Pb of standard samples were found to be 98.5%, 100.1%, 99.3%, respectively, while RSD(n=10) is 0.59% for Hg,1.2% for As and 2.4% for Pb. The method has been applied to the analysis of cosmetics with satisfactory results.