Content Analysis of Five Heavy Metals in Eleven Bulk Medicinal Materials of Guangxi

Objective To survey the content of heavy metals in part of bulk medicinal materials in Guangxi and to analyse and evaluate their safety.Methods The content of heavy metals was determined by atomic absorption spectrophotometry in 22 samples of 11 bulk medicinal materials in Guangxi,while Pb and Cd were determined by the graphite furnace atomizer,and As and Hg were determined by hydride atomic fluorescence spectrometry and the atomic fluorescence spectrometry(AFS)respectively,and Cu was determined by the flameatomic absorption spectrometry.Results The content of Pb,As,Hg and Cu was eligible in the whole samples,the content of 5 kinds of heavy metals was eligible in 12 samples of 6 kinds of medicinal meterials,and the content of Cd exceeded the national standards(China)in 10 samples of 5 kinds of medicinal meterials.Conclusion The contents of heavy metals and harmful elements are in the safety range,which are determined in most samples of bulk medicinal materials of Guangxi,and the content of Cd exceeding the national standards(China)for some samples are unsafe.