Determination of organochlorine pesticides in medicinal plants by capillary gas chromatograph

The capillary gas chromatographic method was introduced for the determination of organochlorine pesticide residues in medicinal plants of Epimdium biolba,Cassia nomame, Anthocyanidins, Rhodiola rosea, Safflower and Pueraria Root. The organochlorine pesticides were extracted from samples by micro-chemical technique. Then, the extracts were cleaned up by solid phase extaction, and separated by HP-5 capillary column with micro-electron capture detector. The average recovery was 92.16%～100.59% and RSD was 0.5%～4.2%. The limits of detection were 1.4×10~(-14)～1.2×10~(-12) g. This method is rapid, sensitive, accurate and suitable for analysis of pesticide residues.