杠板归药材中重金属的含量测定及其质量评价

Determination of Heavy Metal in Polygonum Perfoliatum and Evaluation on its Quality

目的:对不同产地的杠板归药材中铅、镉、汞、砷、铜等重金属元素的含量进行测定,并据此评价其质量。方法:样品经湿法消解后,用原子荧光光度法和原子吸收分光光度法进行检测;采用聚类分析、主成分分析等数理统计方法对测定结果进行分析处理。结果:杠板归药材中镉、汞元素含量超标,超标率分别为镉73.33%、汞6.67%。结论:不同产地的杠板归药材中铅、砷、铜的含量符合相关标准,而有些产地的镉和汞的含量均有超标现象。

Objective：To determine the content of Pb,Cd,Hg,As and Cu in Polygonum perfoliatum from different places and evaluate their quality.Method：The samples were digested and detected by atomic absorption spectrophotometry and atomic fluorescence,and the results measured were treated by mathematical statistical software cluster analysis.Result：The content of Cd and Hg was over the relevant standards,the exceeding rate was Cd 73.33% and Hg 6.67% respectively.Conclusion：The content of Pb,As and Cu in Polygonum perfoliatum from different places is accorded with the correlative standards,while the content of Cd and Hg from some places exceeds the correlative standards.