Study On The Analysis Method Of Pesticides Multi-residual In Ginseng And Dietary Exposure Assessment

China, as the big country producing and exporting ginseng, has large acreage and high yieldaccounted for more than half of international exports.In recent years,the agricultural productquality requirements of international export become more stringent, particularly serious impacton the quality of pesticide residues in agricultural products, So the problem of pesticide residueis concerned by the world’s. Pesticide residues not only affects the quality of ginseng, but alsofor the health of consumers creates a potential hazard in ginseng, the development of pesticideresidue detection technology is particularly important.This paper aims to establish a viablemethod for detecting pesticide residues in ginseng to provide reliable detection method for themonitoring of pesticide residues in ginseng. Based on the establishment of the detection methodof multi-residue pesticide, it assesses the risk through residue data and dietary intake of ginsengin Jilin province and analysis the security of ginseng food.1.Establish five kinds of pesticide residues including chlorothalonil, triadimefon,procymidone, propiconazole and iprodione in ginseng by gas chromatographic-electron capturedetector (GC-ECD) method. Single solvent extraction, solid phase extraction (SPE), DB-17capillary column separation and GC-ECD were used. Five pesticides in27min can get a betterseparation. This experiment studied the extraction solvent, purifying column and eluent onaffect results of recovery. The results show that: the use of acetonitrile as extraction agent,Florisil cartridge purification, acetone-hexane (3︰7, Volume ratio) elution.The recoveries offive kinds of pesticides,under3add levels including0.02,0.05,0.10mg/kg, respectively were80.0%~100.1%、87.8%~101.3%and75.7%~102.0%.The relative standard deviation (RSD)respectively were1.5%～3.3%、0.6%～8.4%and1.3%～11.0%. The method is simple,reproducible, accuracy, precision and sensitivity of the detection of pesticide residues meet thetechnical requirements,that can be used to detect large quantities of ginseng pesticide residues.2. In this paper,dietary risk assessment carried out with using fixed-point method. Usingthe above established detection methods to detect residue of the50batches of ginsengproduction base and wholesale markets from6Cities and counties, Jilin Province.Summarizedfrom the monitoring results to monitoring pesticide residues intermediate values STMR of thechlorothalonil, triadimefon, procymidone, propiconazole and iprodione,the STMR respectivelywere0.037mg/kg,0.04mg/kg,0.07mg/kg,0.076mg/kg,0.06mg/kg. Theory allows daily intake respectively were0.3×10-3mg/bw/day,0.6×10-3mg/bw/day,0.3×10-3mg/bw/day,0.3×10-3mg/bw/day,0.3×10-3mg/bw/day; estimate the daily intake respectively were0.111×10-3mg/bw/day,0.12×10-3mg/bw/day,0.21×10-3mg/bw/day,0.228×10-3mg/bw/day,0.18×10-3mg/bw/day. Pesticide theoretical maximum allowable daily intake of total exposurecalculation accounts for the maximum allowed daily intake of0.016%,0.0032%,0.0048%,0.0068%,0.0079%; according to estimates permissible maximum daily intake amount ofpesticide into account for the calculation of total exposure allows a maximum daily intake of0.0059%,0.0063%,0.0038%,0.0052%,0.0048%. In summary, according to the two methodsto calculate the five kinds pesticides of total pesticide exposure levels are lower than theallowable maximum daily intake.The results show that total pesticide residues of chlorothalonil,triadimefon, procymidone, propiconazole in ginseng is human body acceptable exposure levels.