ICP-MS法比较毛山药和光山药重金属及有害元素含量

Comparison the Content s of Heavy Metals and Harmful Elements in Dioscoreae Rhizoma by ICP-MS

目的:比较毛山药和光山药中铜、汞、铅、砷、镉5种重金属及有害元素的含量。方法:采用微波消解法制备供试品溶液,以锗、铟、铋为内标,电感耦合等离子体质谱(ICP-MS)测定毛山药和光山药中铜、汞、铅、砷、镉5种元素的含量。结果:铜、汞、铅、砷、镉5种待测元素的线性关系良好(r≥0.9995),回收率为82.4%~103.6%;RSD的范围为2.4%~5.9%。含量测定结果显示,和毛山药相比,光山药中5种重金属及有害元素含量均明显下降,铜残留量下降60.41%~73.57%。结论:和毛山药相比,光山药中含有更低含量的重金属及有害元素残留量。

Objective:To compare the contents of five heavy metals and harmful elements(Cu,Pb,As,Cd and Hg)in Maoshanyao and Guangshanyao.Methods:The sample solution was prepared by microwave digestion,and the contents of Cu,Pb,As,Cd and Hg were determined by inductively coupled plasma mass spectrometry(ICP-MS)with Germanium,indium and bismuth as internal standard.Results:The linear relationships of Cu,Pb,As,Cd and Hg were good(r≥0.9995),and the recoveries were 82.4%-103.6%.RSD range was 2.4%to 5.9%.The content determination results showed that compared with Maoshanyao,the content of five heavy metals and harmful elements in Guangshanyao significantly decreased,and the proportion of copper residue reduction was 60.41%-73.57%.Conclusion:Compared with Maoshanyao,Guangshanyao contains lower levels of heavy metals and harmful elements residues.