Quantitative determination of As,Hg,Cd and Pb in Radix Cynanchi A uriculati by atomic fluorescence spectrometry

Objective To set up a quantity determination method of atomic fluorescence spectrometry for detecting four elements in Radix Cynanchi Auriculati,including arsenic(As),hydrargyrum(Hg), cadmium(Cd) and plumbum(Pb).Methods The atomic fluorospectrophotometry was used to determine the contents of As,Hg,Cd and Pb in Radix Cynanchi Auriculati,and the determination method was studied by methodology.Results The results showed that the correlative coefficient of calibration curve was as r0.999 3,the recovery was 99.4%- 102.3%and RSD5%.The contents of the above four elements in Radix Cynanchi Auriculat accorded with the quantity limitation standard of the Pharmacopeia of the People's Republic of China(edition 2005).Conclusion The method is easy, quick,accurate with a higher sensitivity,which can be used in the quantitative determination of heavy metal elements in Radix Cynanchi Auriculat with a satisfactory result.