Magnetic covalent organic framework as a solid-phase extraction absorbent for sensitive determination of trace organophosphorus pesticides in fatty milk
文献类型： 外文期刊
作者： Lin, Xiang-Ping 1 ; Wang, Xin-Quan 1 ; Wang, Jiao 1 ; Yuan, Yu-Wei 1 ; Di, Shan-Shan 1 ; Wang, Zhi-Wei 1 ; Xu, Hao 1 ; Zh 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China
2.Northeast Agr Univ, Coll Agr, Harbin 150030, Peoples R China
3.Key Lab Detect Pesticide Residues & Control Zheji, Hangzhou 310021, Peoples R China
4.Agr Minist, Key Lab Pesticide Residue Detect, Hangzhou 310021, Peoples R China
关键词： Magnetic covalent organic framework; Magnetic solid-phase extraction; Adsorbent; Organophosphorus pesticides; Milk
期刊名称：JOURNAL OF CHROMATOGRAPHY A （ 影响因子：4.759； 五年影响因子：4.302 ）
ISSN： 0021-9673
年卷期： 2020 年 1627 卷
页码：
收录情况： SCI
摘要： A simple and efficient magnetic solid-phase extraction (MSPE) method was established with magnetic covalent organic framework (COF) as adsorbent to enrich organophosphorus pesticides from fatty milk samples, followed by the sensitive determination via LC-MS/MS. The key parameters influencing the MSPE efficiency were comprehensively investigated to afford an optimized procedure. All the target analytes could be captured directly by magnetic COF from milk without protein precipitation, making the pretreatment rapid and convenient. Systematic method validation demonstrated its satisfactory linearity, recoveries (80.0-105 %), and precision (RSDs <12.3 %). The method limits of quantification were 0.2-0.5 mu g L-1. A comparison experiment to the reported solid-phase extraction fully verified the present MSPE more rapid, accurate, and environment-friendly. Furthermore, FT-IR and XPS analysis were performed to reveal the adsorption mechanisms of magnetic COF to organophosphorus pesticides, which could offer guidance on the rational design of COF adsorbent for various target analytes. (c) 2020 Elsevier B.V. All rights reserved.
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