On the long-term dietary exposure and its risk assessment of chlorpyrifos and cypermethrin for the residents in Zhejiang Province

Based on the monitoring data of chlorpyrifos and cypermethrin residue in agricultural products in 2007-2008,the intake of varieties of foods and body weight of different population in Zhejiang Province,the long-term dietary exposure risk levels of chlorpyrifos and cypermethrin in 20 different age and sex groups are estimated with the distribution point estimation method.The result showed that the chronic risk level of chlorpyrifos is much low for different age and sex groups in Zhejiang,and the unacceptable risk would be resulted only when the residue exceeding 99th percentile of the monitoring data (vegetable,fruit and rice is 0.395,0.165 and 0.011 mg/kg,respectively) in long time.The risk level of cypermethrin is lower than chlorpyrifos,and acceptable even the residue of the great mass of his food arrived at maximum of the monitoring data ( vegetable and fruit is 1.830 and 0.519 mg/kg,respectively).Vegetable is shown to be main source of dietary exposure of chlorpyrifos and cypermethrin for the residents in Zhejiang Province,and the key point to decrease the exposure is to control the residue of chlorpyrifos and cypermethrin in vegetables (especially in greengrocery,celery and Chinese cabbage).