Analysis of Pesticide Residues in Citri Reticulatae Pericarpium and Their Risk Assessments

KeyWord:Citri reticulatae Pericarpium  pesticide residues  deterministic approach  risk ranking

Abstract:

      Pesticide residues in Citri reticulatae Pericarpium were analyzed and their risks were assessed.117 pesticide residues in 198 samples were detected by gas chromatography-tandem mass spectrometry(GC-MS/MS) and high performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS).Acute and chronic intake risks were evaluated by using deterministic approach,and the matrix ranking developed by the Veterinary Residues Committee of the United Kingdom was referred to assess the risk scores of the pesticides.Chronic cumulative risk assessment of organophosphorus pesticides were calculated by hazard index(HI) approach.30 pesticide residues which contained 13 forbidden ones were detected in the 198 samples,with a whole detected rate of 98ª±5%and a residue level of 0ª±001-11ª±7 mg/kg.For the pesticides detected,the chronic dietary intake risks expressed as percentage of acceptable daily intake(%ADI) were 0ª±003%-3ª±142%,while their acute dietary intake risks expressed as percentage of acute reference dose(%ARfD) were 0ª±022%-26ª±667%,which were all far below 100%,indicating that there existed very little risk for dietary exposure.The cumulative exposure risks for 6 organophosphorus pesticides were 0ª±942,which were just slightly less than 1,but should be noticed.Risk ranking results showed that 16 pesticides concerning middle and high residue risk should be focused on the production and safety supervision.