超声提取在蔬菜农药检测中的应用

Application of Ultrasonic Extraction in Vegetable Pesticide Detection

目的：探讨超声提取法在蔬菜中有机磷、有机氯和菊酯类农药提取的应用.方法：采用超声提取法对添加有敌敌畏、二嗪磷、乐果、马拉硫磷、倍硫磷、水胺硫磷、乙硫磷、α-666、δ-666、PP’-DDE、pp’-DDT、联苯菊酯、氟氯氰菊酯的青瓜样品进行提取,添加最终浓度分别为0.05、0.1、0.15 μg/g,净化后用气相色谱仪（GC-FPD、GC-ECD）测定回收效果.结果：三个浓度的所有检测农药回收率在80％～110％之间,RSD少于10％,回收率和重复性良好.

Objective： To investigate the effect of ultrasonic extraction method applied in the vegetable pesticide detection of organophosphorus, organochlorine and pyrethroid. Methods： Used the ultrasonic extraction method to extract the pesticides added to the samples of cucumber ,included dichlorvos, diazinon, dimethoate, malathion, fenthion, Isocarbophos, ethion, α-666, δ-666, pp＇-DDE, pp ＇-DDT, bifenthrin, cyfluthrin. The concentrations of cucumber extract were 0.05, 0.1, 0.15μg/mL. The samples were analyzed and calculated the recovery by a gas chromatograph （GC-FPD, GC-ECD）. Results： The recoveries at different pesicide concentration levels are all between 80 % and l l0 % with a RSD less than 10 %, which reveal good recovery rates and a good reproducibility.