Analysis and health risk assessment of DDTs residuals in rice from main grain producing areas of Jiangxi Province

Rice samples were collected from main grain producing areas of Jiangxi Province for testing the concentration of DDTs using GC-ECD. The result shows that the concentration ranges from not detected to 0.1474 mg/Kg, the total detection rate is as large as 75.41% and the highest detection rate among four metabolites appeared in p,p´-DDE and the total, exceeding standard rate by 19.67% totally. In view of different regions, the north-centre region has a higher residual than the south, so as to the detection rate. The assessment model for health risk is used to analyze the DDTs in rice samples. On the whole, the health risk in research area is still in low level. On the regional differences, the north-centre area is in a higher risky than the south. In view of food cycle biomagnifications, the DDTs pollution threatens the health of residents.