红花等三种中药中砷、汞、铅含量的分析研究

Study on content of As,Hg,Pb in Carthamustinctorius L. and the other two kinds of Traditional Chinese Medicines

目的:了解红花等三种中药中砷、汞、铅的含量。方法:采用微波消解法消解中药材样品后,用原子荧光法测定其中的砷、汞、铅含量,并对测定方法进行了方法学考察。结果:对于所测元素,砷、汞、铅标准曲线的相关系数分别为0.99833、0.99987、0.99987;方法的线性范围为0.1μg/L～200μg/L。方法的RSD为2.6%～6.9%。加标回收率为88.0%～115.0%。利用该方法检测实验所用红花、甘草、贝母中砷、汞、铅含量均未超标。结论:该方法快速、简便、准确且灵敏度高,为中药材中重金属含量测定提供了较好的方法。

Objective：To understand the contents of three heavy metals（As,Hg,Pb） in three traditional Chinese medicines.Methods：Samples were digested with microwave digestion system,and the levels of As,Hg,Pb were measured directly by atomic fluorescent spectrometry,and the reproducibility and recovery of the method were studied.Results：For all of the analyzed heavy metals,the correlative coefficients of the calibration curves were 0.99833,0.99987,0.99987 for As,Hg and Pb respectively in the linear range of 0.1 μg/L～200 μg/L,the recovery was 88.0%～115.0%,with RSD of 2.6%～6.9%.The contents of As,Hg,Pb in the three traditional Chinese medicines were normal.Conclusion：The method is convenient,quick,accurate and highly sensitive.The method has been applied to the determination of trace heavy metals in traditional Chinese medicines with satisfactory results.