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[目的]研究腐霉利及其代谢产物在人参植株中的消解动态规律及在人参根中第一生长季的残留量,评价腐霉利在人参种植中使用的安全性。[方法]采用乙腈提取,石墨氨基固相萃取柱净化,气相色谱串联质谱仪测定。[结果]腐霉利在人参植株上施药1次,剂量为2800 g a.i./hm2,在人参植株上的半衰期为18.28 d。腐霉利在人参根中第一生长季的残留量为42.15μg/kg,代谢产物3,5-二氯苯胺在人参根中第一生长季残留量为0.2364μg/kg。[结论]腐霉利属于易降解农药,人参根上腐霉利及其代谢产物的风险商值远小于1,膳食风险较低,食用人参根是安全的。
[Objective] The aim of the study was to study the dynamics of pyrolysis of pythronium and its metabolites in ginseng plant and the residues in the first growing season of ginseng root, and to evaluate the safety of using desmycet in ginseng planting. [Method] The samples were extracted with acetonitrile, cleaned up with graphite amino - solid phase extraction column and determined by gas chromatography - tandem mass spectrometry. [Result] Pyriculariae was applied once to the ginseng plant at a dose of 2800 g a.i./hm2 with a half-life of 18.28 days on the ginseng plant. The residual amount of pythronate in the first growing season of ginseng root was 42.15μg / kg, and the residue of 3,5-dichloroaniline metabolite in the first growing season of ginseng root was 0.2364μg / kg. [Conclusion] Pythium belonged to easily degradable pesticide. The risk quotient of Pythium on ginseng root and its metabolites was far less than 1, the risk of diet was low, and ginseng root was safe.