Facile synthesis of covalent organic frameworks functionalized with graphene hydrogel for effectively extracting organophosphorus pesticides from vegetables

文献类型： 外文期刊

第一作者： Gao, Yuhang

作者： Gao, Yuhang;Gao, Mingkun;Chen, Ge;Tian, Mingshuo;Zhai, Rongqi;Huang, Xiaodong;Xu, Xiaomin;Liu, Guangyang;Xu, Donghui

作者机构：

关键词： Organophosphate pesticides; Covalent organic framework; Solid-phase extraction; HPLC-MS/MS; Vegetable samples

期刊名称：FOOD CHEMISTRY （ 影响因子：6.306； 五年影响因子：6.219 ）

ISSN： 0308-8146

年卷期： 2021 年 352 卷

页码：

收录情况： SCI

摘要： A novel covalent organic framework material (3DGA@COFs), for use as a solid-phase dispersion sorbent, has been synthesized for extracting organophosphorus pesticides (OPs) from vegetables. The prepared 3DGA@COFs material exhibited many advantageous features, including a large specific surface area (127.95 m(2)/g) and high pore volume (0.0344 cm(3)/g), which made it an ideal sorbent for sample pretreatment. The experimental conditions affecting extraction performance (adsorbent type, adsorbent amount, reaction time, pH, ionic concentration, and eluent) were optimized systematically. The extracted analytes were detected by HPLC-MS/MS. Under optimized conditions, the proposed method exhibited a wide linear range (0.5-100 mu g/L) and low limits of detection (0.01-0.14 mu g/L). The recoveries (75.40%-102.13%) satisfied the requirements for a precise detection method. The proposed method was successfully used for determining malathion, triazophos, quinalphos in lettuce, tomato and cucumber samples, thus indicating the potential of using 3DGA@COFs materials for pretreating vegetable samples.

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