Determination of Organochlorine Pesticides Residues in RADIX RHIZOMA GLYCYRRHIZAE by GC

[Objective] The aim was to establish a new method to determine the organochlorine pesticides residues in RADIX RHIZOMA GLYCYRRHIZAE.[Method] Ultrasonic extraction of the tested samples was carried out by petroleum ether.After the sulfonation of concentrated sulfuric acid,the sample was determined by the GC chromatography with capillary column.[Result] the lowest detection limit of organochlorine pesticides by GC was 0.000 125-0.000 689 mg/kg,with the RSD being 0.78%-4.98% and recovery being 86.15%-102.12%.There were only γ-BHC in the samples and the quality was 0.001 mg/kg.[Conclusion] Compared with the traditional method,GC was more sensitive,accurate and favorable for the detection of organochlorine pesticides residues.