中文摘要：本文在19-21摄氏度下使用不同萃取系统分析了自然状态下40种农药的分布规律，并计算了所有农药在正己烷和极性相之间的分布常数(P)和分布系数(D)。结果发现，乙腈中的高氯酸溶液将40种农药残留几乎全部充分地且有特异性的从己烷和蔬菜油中萃取出来，并且将丁苯吗啉的分布系数(D)降低了29000倍。本文使用乙腈酸萃取方法构建了一种改进的定量分析技术，该技术可广泛应用于采用气相色谱-质谱法对油菜籽、亚麻籽、葵花籽油和橄榄油中的农药残留进行了定量检测的分析中。结果发现，新型的检测方法扩大了气相色谱-质谱法原本的农药检测范围，农药残留回收率在85-115%之间，相对标准差小于10%，检测限最小为0.001μg/kg，最大为0.1μg/kg，但均小于或等于欧盟规定的最大残留值。
外文摘要：The distribution of 40 pesticides of basic nature in different extraction systems was studied at 20 +/- 1 degrees C. The distribution constants (P) and istribution ratios (D) between n-hexane and polar phases are calculated. It was found that the studied pesticides are most fully and selectively extracted from hexane and egetable oils by solutions of perchloric acid in acetonitrile. In particular, heacidification of acetonitrile decreases the D-value of fenpropimorph by 29,000 times. This phenomenon was used for the development of an improved technique for the uantitative analysis of widely used pesticides of basic nature in rapeseed, linseed,sunflower and olive oils by GC-MS. The proposed approach allows obtaining much purer sample extracts, compared with the use of standard solvent extraction with further purification by the freezing-out technique. This approach expands the range of pesticides (flutriafol, fenpropidine, metazachlor, cyprodinil and others) that can be determined by GC-MS. The recovery values of the studied pesticides from vegetable oils were between 85% and 115% with RSD values below 10%. The obtained limits of detection ranged from 0.001 to 0.1mgkg(-1), and are below or equal to the maximum residue levels (MRLs) set by the European Union for the corresponding pesticides.
 
外文关键词：Sample preparation, acetonitrile, pesticide of basic nature, perchloric acid, distribution constant, recovery
作者：Zayats, Mikhail F.; Leschev, Sergey M.; Zayats, Marina A.
作者单位：RUE Inst Plant Protect, Pesticide Dynam Lab, 2 Mira St, Priluki 223011, Minsk Distr, Byelarus.
期刊名称：FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
期刊影响因子：1.878
出版年份：2016
出版刊次：8
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