Determination of Heavy Metals in Radix Glehniae from Different Producing Areas

Objective To determine the contents of heavy metals and harmful elements in Radix Glehniae from different producing areas and to compare the contents of Cu,Pb,As,Cd and Hg.Methods Cu was determined by flame atomic absorption spectrometry,Pb and Cd were determined by graphite atomic absorption spectrometry,and the contents of As,Hg were determined by atomic fluorescence spectroscopy.The contents were calculated simultaneously by calibration curves.Results The contents of Cu,As,Hg were lower than the national limit standard,but the contents of Pb,Cd in some areas were higher than the national limit standard.Conclusion This experiment provides the scientific basis for formulating the element limit standard,improving the quality of Radix Glehniae,and ensuring the clinical safety.