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Magnetic mesoporous material derived from MIL-88B modified by L-alanine as modified QuEChERS adsorbent for the determination of 6 pesticide residues in 4 vegetables by UPLC-MS/MS

文献类型： 外文期刊

作者： Wang, Meng 1 ; Wang, Jingjing 2 ; Wang, Kangkang 1 ; Zhang, Liugen 1 ; Cao, Xianglei 1 ; Guo, Cheng 1 ; Wang, Jide 1 ; Wu, Bin 3 ;

作者机构： 1.Chem Engn Xinjiang Univ, Coll Chem, Key Lab Oil & Gas Fine Chem, Minist Educ & Xinjiang Uygur Autonomous Reg, Urumqi 830046, Peoples R China

2.Xinjiang Uygur Autonomous Reg Ctr Dis Control & P, Urumqi 830002, Peoples R China

3.Tech Ctr Urumqi Customs, Urumqi 830063, Peoples R China

4.Xinjiang Acad Agr Sci, Inst Commod Storage Proc, Urumqi 830091, Xinjiang, Peoples R China

5.Proc Xinjiang Acad Agr Sci, Urumqi, Xinjiang 830091, Peoples R China

关键词： Magnetic mesoporous carbon; L-alanine; QuEChERS adsorbent; Carbamate and neonicotinoid; UPLC-MS/MS

期刊名称：FOOD CHEMISTRY （ 影响因子：9.231； 五年影响因子：8.795 ）

ISSN： 0308-8146

年卷期： 2022 年 384 卷

页码：

收录情况： SCI

摘要： More and more attention has been paid to the improved QuEChERS (quick, easy, cheap, effective, rugged and safe) method in dealing complex sample matrices, especially for the study of QuEChERS adsorbents. In this study, a magnetic mesoporous material, which was derived from MIL-88B modified by L-alanine, was synthesized as modified QuEChERS adsorbents for the simultaneous determination of multiple pesticides (Methomyl, Isoprocarb, Carbofuran, 3-Hydroxycarbofuran, Acetamiprid, Imidacloprid) in Chinese cabbage, celery, long bean and leek. The prepared magnetic adsorbents can effectively remove interfering substances from the sample, and the proposed modified QuEChERS method can reduce sample pretreatment time via an external magnetic field. To achieve the best performance of QuEChERS method, the clean-up time and amount of QuEChERS adsorbents were investigated. Under the optimized conditions, a simple, rapid and sensitive method for the determination of 6 pesticide residues in vegetables was established by coupling the modified QuEChERS to ultrahigh-performance liquid chromatography-tandem mass spectrometry. Excellent sensitivity (The limit of detection for the 6 pesticides ranged from 0.001 to 0.020 mu g kg(-1)), satisfactory linearity (r(2) & GE; 0.9952), good recovery (73.9-107.7%) and good precision (3.6-16.9% for intraday relative standard deviation, 0.5-15.0% for interday relative standard deviation) were obtained. Compared with traditional QuEChERS method, the proposed method is simple, costeffective, and efficient, which indicates that the method can be used to detect carbamate and neonicotinoid pesticides in real samples and provide an excellent pretreatment technique for the detection of trace multianalytes from complex substrates.

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