气相色谱法测定韭菜中有机磷农药残留量

Determination of organophosphorus pesticide multi-residues in leek by gas chromatography

摘要: 建立了毛细管气相色谱法、火焰光度检测器分析韭菜中的8种有机磷农药残留量的方法．实验结果表明:采用程序升温所测定的8种有机磷农药,在色谱柱DB-608上分离良好,回收率在70%-119%之间;最低检测质量浓度分别为敌敌畏0．02μg·mL^-1,甲胺磷0．01 μg·mL^-1,乙酰甲胺磷0．02μg·mL^-1,甲拌磷0．01 μg·mL^-1,氧化乐果0．05μg·mL^-1,乐果0．01μg·mL^-1,甲基对硫磷0．01μg·mL^-1,毒死蜱0．02μg·mL^-1．该方法快速灵敏,符合实际应用的需要．

Abstract: This paper proposed a determination method for 8 organophosphorus pesticides residues of dichlorvos, methamidophos, acephate, phorate, omethoate, dimethoate, parathionmethyl and chlorpyriphos in leek. The 8 organophosphorus pesticides were separated from each other through DB-608 capillary column and determined by flame photometric detector, and the recoveries ranged 70%~119%. The lowest determination concentrations of the 8 organophosphorus pesticides are 0.01~0.02 μg·mL^-1 This method is rapid and sensitive, and meets the demands of actual application.