果蔬中有机氯农药残留的分析测定

Determination of Organchlorine Pesticides in Vegetable and Fruit

目的：用高效气相色谱法对蔬菜和水果中的有机氯农药残留进行测定分析。方法：称取一定量的样品,采用丙酮和乙酸乙脂（4∶1）提取,旋转蒸发仪上蒸发近干,石油醚和乙酸乙脂（4∶1）洗脱过柱净化,再用旋转蒸发仪蒸发近干,5ml石油醚定容,在高效气相色谱仪上进行色谱分析。结果：样品采用匀浆提取法,测定选择BPX608石英毛细管柱,柱温225℃,样品的回收率在92%-105%之间。结论：该法具有简便、快捷、准确的特点,为进一步改进测定方法提供依据。

Obiective： Gochlorine pesticide residues of vegetable and fruit was examined by gas chromatography technique. Method： Some samples was weighted out , and abstracted by acetonea and ethyc acetate which scale was 4 to 1. The abstracted fluid was evaporated nearly dryness on the efficient heidolph custruction , then, the residue was washed and crossed the purify column to purify it. and the fluid was evaporated nearly dryness on the efficient heidolph custruction again. The residued was quantified in 5ml with petroleum ether and analysised by the gas chromatography technique. Result： The capillary column was BPX608, the column temperature was 225 ℃, the recovery of the samples between 92% - 105 %. BHC was examined and the concentration of examined DDT was 0. 049μg/kg, the result suggest that the organoehlorine pesticide residues of vegetable and fnfit was little. Conelusion： This method was simple,rapid and accurate and provide basis on improving examine method.