文献类型：期刊文献

英文题名：A magnetic covalent organic framework as selective adsorbent for preconcentration of multi strobilurin fungicides in foods

作者：Wang, Qian[1,2];Wu, Yujie[1];Guo, Wei[1];Zhang, Feifang[2];Zhang, Feng[1]

机构：[1]Chinese Acad Inspect & Quarantine, Inst Food Safety, Beijing 100176, Peoples R China;[2]East China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R China

年份：2022

卷号：392

外文期刊名：FOOD CHEMISTRY

收录：;EI(收录号：20222312189433);WOS:【SCI-EXPANDED(收录号:WOS:000809649200008)】；

基金：Acknowledgements The authors thank the Special Fund for Basic Scientific Research Operation Expenses of central public welfare scientific research in-stitutes of CAIQ for the financial support (2020JK007) .

语种：英文

外文关键词：Magnetic covalent organic framework; Multi strobilurin fungicides; Selective solid-phase extraction; UHPLC-MS; MS; Foods

摘要：A new method that utilizes a magnetic covalent organic framework (Fe3O4@BTA-TAPM) as a selective solidphase extraction adsorbent has been developed for the simultaneous preconcentration of trace eleven kinds of strobilurin fungicides (SFs) in foods combined with ultra-high performance liquid chromatography-tandem mass spectrometry. The preconcentration conditions were optimized, including the adsorbent amount, extraction time, pH value, shaking time, elution solvent, desorption time and the interference ions. The maximum adsorption capacity of the adsorbent was ranging from 42.84 mg g-1 to 54.18 mg g-1 for eleven SFs. The low limits of detection were 0.003-0.072 mu g kg-1. The recoveries of eleven SFs spiked at levels of 0.25-1000 mu g kg-1 ranged from 80.2% to 109.3%, and the relative standard deviations were <6.8% (n = 3). The utility of the adsorbent was demonstrated to determine traces SFs in four different samples.