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J.Health Sci., 53(4), 464-469, 2007
Multi-residue Analysis of 18 Organochlorine Pesticides in 10 Traditional Chinese Medicines by Gas Chromatography (GC)
Nan Sun,a Lili Hao,a
Jian Xue,*, a Hongyu Jin,b
Jingai Tian,b and Ruichao Linb
aInstitute of Medicinal Plant Development, Chinese Academy of Medical Science and Peking Union Medical College, No. 151 Malianwa North Road, Haidian District, Beijing 100094, P. R. China and
bNational Institute for The Control of Pharmaceutical and Biological Products, No.2 Tiantan Xili, Chongwen District, Beijing 100050.
A rapid and simple method for the simultaneous analysis of 18 pesticides (α-(C6H6Cl6)-Benzene hexachloride, β-BHC, γ-BHC, δ-BHC, heptachlor, heptachlor epoxide, tecnazene, pentachloronitrobenzene (PCNB), hexachlorobenzene, aldrin, methyl pentachlorophenyl sulphide (MPCPS), α-endosulfan, trans-chlorodane, cis-chlorodane, p,p'-(C14H8Cl4)-Dichlorodiphenyl dichloroethylene, o,p'-(C14H9Cl5)-Dichlorodiphenyl trichloroethane, p,p'-(C14H10Cl4)-Dichlorodiphenyl dichloeoethane, p,p'-DDT) by gas chromatography (GC) in 10 Traditional Chinese Medicines (TCMs) has been developed. The limit of detection was found to be 1.2×10-13 to 9.0×10-13 g with the recoveries ranging from 72.9 to 114.5% and Relative Standard Deviation being less than 17.5%. In addition, the assay was applied to monitor the residues in 10 TCMs, amongst which at least one of the above pesticides were found in 67 samples. The results showed that α-BHC was the most frequently detected with a presence of 44.6% in the tested samples, whilst heptachlor epoxide, trans-chlorodane, cis-chlorodane and p,p'-DDD were not detected at all. Nonetheless, none of pesticides in all samples appeared to exceed the maximum residue limits (MRLs) seen in the Chinese regulations.
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