Study on Profile of Residues of Organochlorine Pesticides in Scrophulariae Radix and Its Limit Standard

LIANG Huihui, LI Long, ZHANG Xili, ZHU Junping, WEN Wen, MAO Yan, ZHOU Xiaojiang, LI Ling, CHEN Naihong, LIU Wenlong

LIANG Huihui1,2,3, LI Long1,2, ZHANG Xili1,2,3, ZHU Junping1,2,3, WEN Wen1,2,3, MAO Yan1,2,3, ZHOU Xiaojiang4, LI Ling5, CHEN Naihong4, LIU Wenlong1,2,3,4

1. College of Pharmacy, Hunan University of Chinese Medicine, Changsha 410208, China; 2. Changde Affiliated Hospital, Hunan University of Chinese Medicine, Changde 415600, China; 3. Hunan Key Laboratory of Druggability and Preparation Modification of Traditional Chinese Medicine, Changsha 410208, China; 4. Hunan Engineering Technology Research Center of Standardization and Function of Chinese Medicine Decoction Pieces, Changsha

410208, China; 5. Drug Church (Hunan) Pharmaceutical Co., Ltd., Changde 415600, China

Abstract: Objective To obtain profile of residues of organochlorine pesticides in medicinal materials and decoction pieces of Scrophulariae Radix; To establish the limit standard for the residue of organochlorine pesticides. Methods Rapid gas chromatography was used to determine the residues of 21 organochlorine pesticides in medicinal materials of Scrophulariae Radix from ten producing areas of China and 30 batches of Scrophulariae Radix Decoction Pieces from seven producing areas. The 99% confidence interval was investigated, and the limit standard for organochlorine residue of Scrophulariae Radix was established. Results The determination of residues of 21 organochlorine pesticide in samples of Scrophulariae Radix was among 0.000 1–0.077 7 μg/g, and contents of BHC, heptachlor, and endosulfan occupying 93%–96% of total pesticide residue. The national industry standard for the limit of organochlorine pesticides was established. Conclusion The residues of organochlorine in Scrophulariae Radix are mainly BHC, heptachlor, and endosulfan. The limit standard of total organochlorine for Scrophulariae Radix was no higher than 0.700 μg/g.

Keywords: Scrophulariae Radix; organochlorine residues; pesticide residues; limit standard; industry standard