Determination of organochlorine pesticide residues in rice and human and fish fat by simplified two-dimensional gas chromatography

The residue levels of four hexachlorocyclohexane (HCH) isomers (alpha-HCH, beta-HCH, gamma-HCH and delta-HCH), 4 dichloro-diphenyl-trichloroethane (DDT) congeners (p,p-DDE, o,p-DDT, p,p-DDD, and p,p-DDT), heptachlor, heptachlor epoxide, aldrin, dieldrin and endrin in rice and its bran from Jiangsu Province, PR China, were investigated by simplified two-dimensional gas chromatography, coupled with micro-electronic capture detector (mu ECD). Concentrations of organochlorine pesticides (OCPs) for Sigma HCH ranged from 0 to 0.039 mg kg(-1) in the rice and 0 to 0.057 mg kg(-1) in its bran. For Sigma DDT, the concentrations ranged from 0 to 0.053 mg kg-1 in the rice and 0 to 0.051 mg kg(-1) in its bran. The five other OCPs, except HCH and DDT, were not detected. The major HCH isomers and DDT, congeners detected, both in the rice and its bran, were beta-HCH and p,p'-DDE. Compared with the residue levels in the rice, the OCPs levels in fish and human fat were detected at higher residue levels. It is necessary to investigate the OCP residues in foodstuffs of the food chain in order to evaluate the potential health risk to humans. (c) 2006 Elsevier Ltd. All rights reserved.