中文摘要：本文提出了一种应用SPE、分散液-液微萃取技术和GC-MS技术有效分离和检测多种农药痕量残留的预富集方法。研究结果发现该方法的检测限在0.5-1.0ng/mL之间；试验筛选出了最佳富集条件，在此条件下样本的预富集倍数为2362-10593/100ML。本方法提高了萃取效率，并能够从不同的食物样本中进行农药残留的分离、富集和测定。
外文摘要：In this work, an effective preconcentration method for the extraction and determination of traces of multi-residue pesticides was developed using solid-phase extraction (SPE) coupled with dispersive liquid-liquid microextraction and gas chromatography-mass spectrometry (GC-MS). Variables affecting the performance of both extraction steps such as type and volume of elution and extraction solvents, breakthrough volume, salt addition, extraction time were thoroughly investigated. The proposed method resulted in good linearities (R-2 > 0.9915) over the ranges of 1-10,000 ng kg(-1), limits of detection (LODs) in the range of 0.5-1.0 ng kg(-1) at S/N = 3, and precision of RSD% of <= 11.8. Under optimal conditions, the preconcentration factors were obtained in the range of 2362-10,593 for 100 mL sample solutions. Comparison of the proposed method with other ones demonstrated that SPE-DLLME method provides higher extraction efficiency and larger preconcentration factor for determination of pesticides residues. Further, it is simple, inexpensive, highly sensitive, and can be successfully applied to separation, preconcentration and determination of the pesticides (and other noxious materials) in different real food samples. (C) 2016 Elsevier Ltd. All rights reserved.
外文关键词：Solid-phase extraction；Dispersive liquid-liquid microextraction；Multi-residue 29 pesticides；Gas chromatography-mass spectrometry；Food sample analysis
作者：Mojtaba Shamsipura；Najmeh Yazdanfara；Mahnaz Ghambarian
作者单位： Department Chemistry, Razi University, Kermanshah, Iran
期刊名称：FOOD CHEMISTRY
期刊影响因子：4.052
出版年份：2016
出版刊次：2
点击下载：固相萃取、分散液-液微萃取技术与GC-MS方法联用测定水、牛奶、蜂蜜和果汁中的农药残留