[Residue Levels and Health Risk Assessment of Organochlorine Pesticides in Rice from Shanghai]

As one of the main producers and consumers of pesticides in the world, China has historically used large quantities of organochlorine pesticides, such as DDT and HCH. Rice is a staple food crop in Shanghai, where the Qingpu and Chongming districts are two important rice planting areas. This study detected the residue levels of 24 organochlorine pesticides (OCPs) in rice samples collected from Qingpu and Chongming in Shanghai. The composition and health risk of OCPs in rice samples were investigated. The results revealed that DDTs and HCHs were the main OCPs in rice from the study area. The mean levels of 24 OCPs residues in rice from Qingpu and Chongming were 6.53 ng·g^-1 and 4.70 ng·g^-1, respectively. The analyses of all the target compounds met the China National Food Safety Standard. The concentrations of 4,4-DDE and β-HCH were the highest in rice from Qingpu, while 2,4-DDT and β-HCH were the main components in rice from Chongming. Source analysis showed that dicofol and lindane might be still used recently in some areas of Shanghai. The health risk assessment results indicated that there was no obvious risk to human health by eating rice from Shanghai based on the OCPs studied.