中文摘要：本文开发了一个高灵敏度检测蔬菜中四种农药（乐果、毒死蜱、溴氰菊酯和氯氰菊酯）的新型萃取和提纯方法，该方法采用丙酮和乙酸乙酯（95：5正己烷混合物）进行样本萃取，正己烷中5%丙酮的最佳洗脱率进行提纯，然后采用电子捕获检测器进行气相色谱分析。在优化条件下，蔬菜中农药残留回收率范围为80-112%，相对标准差小于等于5%（n=3），乐果、毒死蜱、氯氰菊酯和溴氰菊酯的检测限分别为1、0.96、1.3和1.9 ng/mL，定量限分别为3.3、2.9、3.9和5.8 ng/mL。该分析程序具有精度高、灵敏度可接受和满足蔬菜农药残留监测需求等特点，目前该方法已经成功地应用于部分蔬菜农药残留检测。
 
外文摘要：We have developed a new extraction and purification method for high sensitive determination of four pesticides, Demethoate (Di), Chlorpyrifos-ethyl (CPE), Deltamethrin (Del) and Cypermethrin (Cyp) from vegetables. The method involves the extraction of samples with acetone and Ethylacetate: Hexane (95: 5, v/v) mixture, purification using Florisil cartridges at optimum eluting ratio of 5% acetone in hexane, then followed by gas chromatography using electron capture detection (ECD). Under the optimized condition, the recovery of the pesticides from vegetables reach the range of (80-112%) with RSD% <= 5% (n= 3), the limit of detection for Di, CPE, Cyp, and Del, were 1, 0.96, 1.3, and 1.9 ng mL (-1), and the limit of quantification was 3.3, 2.9, 3.9, and 5.8 ng mL (-1), respectively. This analytical procedure was characterized with high accuracy and acceptable sensitivity to meet the requirements for monitoring pesticides in vegetables. The method was applied successfully for the determination of pesticides in some local vegetable contamination. (C) 2012 Production and hosting by Elsevier B.V. on behalf of King Saud University.
 
外文关键词：Solid-phase extraction, Gas chromatography, Pesticides, Residues, Vegetables
作者：Seddik, Hassan; Marstani, Zakaria; ALazzam, Taiser
作者单位：Univ Aleppo, Fac Sci, Dept Chem, Aleppo, Syria.
期刊名称：ARABIAN JOURNAL OF CHEMISTRY
期刊影响因子：3.613
出版年份：2017
出版刊次：2
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