农药的绿色分析方法研究Ⅰ.聚乙二醇辛基苯基醚水溶液作为农药前处理试剂的研究

为了避免检测农药残留试样前处理过程中有毒有机溶剂的使用，用聚乙二醇辛基苯基醚（OP）水溶液作为提取蔬菜样品中甲氰菊酯、功夫菊酯和氯氰菊酯农药残留物的萃取剂，采用固相萃取方法（SPE）对萃取液中农药进行富集。通过改变OP水溶液浓度和有机添加剂种类，研究了萃取和富集的条件：以5％OP＋2％尿素作提取液，过SPE小柱，乙腈洗脱。所研究的样品前处理方法用于蔬菜样品中几种菊酯类农药的检测，与液液萃取方法相比，本试验结果相对偏差为2．7％～7．7％。

Study of green analytical technique for pesticideⅠ. Study of octylphenyl-poly ( ethylene glycol) as the extractive agent for pesticide pre-treatment

In order to saving the amount of organic solvent in the course of sample pre-treat for detecting pesticide residue,octylphenyl-poly(ethylene glycol)was used as the agents to extract fenpropathrin,cypermethrin,cyhalothrin from the sample.Surfactant solution can be hardly concentrated.A SPE method was used to enrich the leachate.By means of changing the concentration of OP solution and the varieties of organic additive,the enrichment condition was optimized:5%OP+5% carbamide as the extractive agent,using SPE,acetonitrile as eluent.The pre-treat method was used to treat vegetable sample.The pre-treat method gives results similar to the method with acetonitrile,with recoveries and precisions in agreement with directives for method validation in residue analysis.