Determination of As, Hg, Se, Cd in Radix linderae by hydride generator-atomic fluorescence spectrometry with microwave digestion.

[Objective]To explore the method of determining heavy metal elements in Radix linderae and provide an efficient path for monitoring heavy metal pollution of traditional Chinese medicine. [Methods] Samples were processed with microwave digestion method. Then the content of As,Hg,Se and Cd was determined by Hydride Generation- Atomic Fluorescence Spectrometry. [Results]The adding standard recovery rates of elements were 96. 8%- 103. 9%. The RSD was less than 4%. The result indicated good precision and accuracy. The detection limits of various elements were 0. 05- 0. 36 ng / mL,which can meet the test requirement of inorganic element in Chinese herbal medicine. The contents of As,Hg,Se and Cd in Radix linderae did not exceed the limited range. [Conclusions]The method was simple,rapid and sensitive. The result was satisfactory when measuring samples with the method,so it could be used for popularization and application.