Ternary magnetic Fe3O4@C3N4@covalent organic framework for facile extraction and determination of organophosphorus pesticides in fruit

文献类型： 外文期刊

第一作者： Gao, Yuhang

作者： Gao, Yuhang;Zhao, Chenxi;Tan, Qiyue;Gao, Mingkun;Chen, Ge;Zhai, Rongqi;Huang, Xiaodong;Xu, Xiaomin;Liu, Guangyang;Xu, Donghui;Zhao, Chenxi;Tan, Qiyue;Zhang, Yaowei;Wang, Jing

作者机构：

关键词： Pesticide; Covalent organic framework; Adsorption; Food safety; Detection

期刊名称：MICROCHEMICAL JOURNAL （ 影响因子：5.304； 五年影响因子：4.723 ）

ISSN： 0026-265X

年卷期： 2022 年 174 卷

页码：

收录情况： SCI

摘要： In this study, a magnetic composite material was prepared based on covalent organic framework (COFs) materials for the detection of trace organophosphorus pesticides. Fe3O4@C3N4@COFs were synthesized by a layerby-layer assembly strategy and applied to the selective identification, detection and removal of profenofos pesticides using magnetic solid-phase extraction technique. After seven regeneration cycles, the composite exhibited excellent selectivity and affinity for profenofos, and eventually still achieved an extraction efficiency higher than 75%. Under optimized conditions, the proposed magnetic solid-phase extraction method coupled with high-performance liquid chromatography-tandem mass spectrometry showed a low limit of detection (1 x 10-5 mu g/mL) for profenofos. The developed method was successfully used to detect profenofos in spiked fruit samples with satisfactory recoveries (74.33% -116.59%) and relative standard deviations (0.27% -7.41%). This study highlights the potential of COFs-based magnetic composites in sample pretreatment for targeted analysis and is a novel pathway for efficient sample preparation in food safety analysis.

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