英德横石水镇贫困村蔬菜中农药残留及重金属污染分析

Analysis of Pesticide Residues and Heavy Metal Pollution in Vegetables of a Poor Villagein Hengshishui Town, Yingde City

摘要:

本文研究分析了英德横石水镇溪北村蔬菜中的农药残留和重金属污染。选取24个蔬菜样品，采用气相色谱-双火焰光度检测器（GC-FPD）测定蔬菜中的甲胺磷、甲拌磷、特丁硫磷、甲基对硫磷、杀螟硫磷、甲基异柳磷、丙溴磷、伏杀硫磷、敌敌畏、乙酰甲胺磷、治螟磷、氧乐果、乐果、毒死蜱、马拉硫磷、对硫磷、水胺硫磷、杀扑磷、三唑磷和亚胺硫磷等20种有机磷农药残留；采用气相色谱-电子捕获检测器（GC-ECD）测定蔬菜中的α-六六六、β-六六六、γ-六六六、δ-六六六、百菌清、三唑酮、甲氰菊酯、哒螨啉、氯氰菊酯、氰戊菊酯、溴氰菊酯和氟虫腈等12种农药残留；采用原子吸收-石墨炉法测定铅含量；原子荧光分光光度法测定砷和汞含量，结果表明蔬菜样品中均未检出上述32种农药及3种重金属。研究结果可为英德横石水镇溪北村蔬菜质量定位提供理论依据。

Abstract:

The paper analyzed the pesticide residues and heavy metal pollution in vegetables of xibei village in hengshishui town, Yingde city. The gas chromatograph (GC)-flame photometric detector (GC-FPD) was adopted to determine the 20 organophosphorus pesticide residues of 24 vegetable samples, , including methamidophos, pharate, terbufos, parathion-methyl, fenitrothion, isofenphos-methyl, Profenofos, Phosalone, dichlorvos, acephate, sulfotep, omethoate, dimethoate, chlorpyrifos, malathion, paraoxon, isocarbophos, methidathion triazophos and phosmet. 12 pesticide residues , including α-BHC(benzene hexachloride), β-BHC, γ-BHC, δ-BHC, chlorothalonil, traidimefon, fenpropathrin, Pyridaben, cypermethrin, fenvalerate, deltamethrin and fipronil, were determined by gas chromatograph (GC)-electron capture detector(GC-ECD) In addition, the plumbum content was detected by atomic absorption- graphite furnace and the content of arsenic and mercury was detected by atomic fluorescence spectrophotometry . The detection results showed that none of the aforementioned 32 pesticides and 3 heavy metals were detected in vegetable samples. These results could provide a theoretical basis for the position of vegetables quality of xibei village in hengshishui town, Yingde city.