ICP-MS法测定畲药十二时辰中4种重金属元素的含量

Content Determination of 4 Heavy Metals in ShiEr ShiChen by ICP-MS

目的建立测定畲药十二时辰中Fe、Cu、Zn、Mn含量的方法。方法采用ICAP Q ICP-MS仪,以Fe、Cu、Zn、Mn为标准溶液,Sc、Ge为内标溶液,测定样品中Fe、Cu、Zn、Mn的含量。结果在检测浓度内各重金属的线性关系均良好,回收率均大于90%,RSD均小于2%(n=3)。结论本方法专属性强,操作方便,结果准确,可用于测定畲药十二时辰中Fe、Cu、Zn、Mn含量。

OBJECTIVE To establish the method for the content determination of heavy metals in ShiEr ShiChen Fe, Cu, Zn and Mn.METHODS The contents of as Fe, Cu, Zn and Mn were determined by using ICP-MS with Sc and Ge as internal standard, Fe, Cu, Zn and Mn as standard solution of quality control.RESULTS The calibration curve of heavy metals was in linear relationship(r≥0.99) with recovery>90%(RSD≤2%,n=3).The contents of heavy metals were all in an acceptable range.CONCLUSION This method is simple, accurate, reliable and specific, and it can be used for the content determination of heavy metal in ShiEr ShiChen.