【摘要】 建立了水果、蔬菜食品中有机磷农药的提取、净化及其毛细管柱气相色谱测定法。用水和丙酮溶剂提取 ,填有无水 Na2 SO4 和Al2 O3的层析柱净化 ,浓缩后采用火焰离子化检测器 (FID)检测到样品中甲胺磷、对硫磷、马拉硫磷、甲基对硫磷的添加回收率分别为81%～ 90 % ,82 %～ 90 % ,84%～ 10 2 % ,80 %～ 90 % ,变异系数均小于8.0 %。实验表明 ,该方法在一定条件下具有灵敏度高 ,净化效果好 ,适用性广等特点 ,可以作为一种常规测定方法。更多还原

【Abstract】 The present paper introduces a method for extracting, purifying organphosphorus pesticide residues in fruits and vegetables as well as for their determination by capillary chromatographic. First of all, it presents the method on how to extract the four kinds of pesticide residues in the sample form, namely, methamidophos, parathion, malathion, parathion-methyl were extracted respectively by using water and acetone as solvents. Secondly, it introduces the purification process by means of a column(1.5 cm×30 cm) packed with anhydrous sodium sulfate and alumina. Last of all, the pesticide residues are concentrated for some time in the rotatory evaporator and then the final samples are determined by the flame ionization gas chromatography. Recoveries of the four kinds of pesticide residues in the samples were 81%90%,82%90%,84%102% and 80%90% respectively, and the coefficient of their variations were all less than 8.0% after calculation. The results indicate that the above method is highly sensitive, repeatable and applicable.更多还原