中文摘要：由于坚果含水量低、脂肪含量高，难以同时测定多种痕量农药残留。因此，本文开发了一个样本预处理方法，首先采用采用微波辅助溶剂萃取法提取，然后采用冷冻分离结合分散固相萃取净化，最后采用超高压液相色谱-串联质谱联用技术同时测定复杂坚果样品中的106种农药。三种浓度水平下，平均回收率范围为75.3-119.3%，相对标准差小于14%。检测限和定量限范围分别为0.3-3.0 和1.0-10.0μg/kg，此外，该方法已经成功地应用于180个市售坚果样本的农药残留检测。
外文摘要：As a result of the low water content and high fat matrices in nuts, it is very difficult to simultaneously determine multi-pesticides in trace levels. Here, a sample pretreatment method was developed in which, microwave-assisted solvent extraction was firstly used to extract pesticides, and then a two-step cleanup method was conducted combining freeze-out with dispersive solid-phase extraction to remove the lipidic matrix. By this way, 106 pesticides were simultaneously determined in the complicated nut sample by using an ultra-high pressure liquid chromatography coupled with a tandem mass spectrometer. Averagerecoveries were 75.3-119.3% with relative standard deviations <14% at three concentration levels. The limits of detection and quantification were in the ranges of 0.3-3.0 and 1.0-10.0 mu g/kg, respectively. Furthermore, the method was successfully applied to the determination of pesticides in 180 commercial nut samples.
外文关键词：freezing-out cleanup, liquid chromatography-tandem mass spectrometry, microwave-assisted solvent extraction, nuts, pesticide residues
作者：Wang, Jingjing; Gong, Zhiguo; Zhang, Tingting; Feng, Shun; Wang, Jide; Zhang, Yi
作者单位：Xinjiang Univ, Key Lab Oil & Gas Fine Chem, Minist Educ & Xinjiang Uygur Autonomous Reg, Coll Chem & Chem Engn, Urumqi 830046, Peoples R China.
期刊名称：JOURNAL OF SEPARATION SCIENCE
期刊影响因子：2.557
出版年份：2017
出版刊次：6
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