Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Vegetables Quality and Safety Control, Ministry of Agriculture of China, Beijing 100081, People's Republic of China.
Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Vegetables Quality and Safety Control, Ministry of Agriculture of China, Beijing 100081, People's Republic of China.
Food Chem. 2021 Aug 1;352:129187. doi: 10.1016/j.foodchem.2021.129187. Epub 2021 Feb 5.
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/g) and high pore volume (0.0344 cm/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 μg/L) and low limits of detection (0.01-0.14 μg/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.
一种新型的共价有机框架材料（3DGA@COFs），被用作固相分散吸附剂，用于从蔬菜中提取有机磷农药（OPs）。所制备的 3DGA@COFs 材料具有许多优势特征，包括大的比表面积（127.95 m/g）和高的孔体积（0.0344 cm/g），使其成为样品预处理的理想吸附剂。系统优化了影响提取性能的实验条件（吸附剂类型、吸附剂用量、反应时间、pH 值、离子浓度和洗脱液）。提取的分析物通过 HPLC-MS/MS 进行检测。在优化条件下，该方法表现出较宽的线性范围（0.5-100 μg/L）和较低的检测限（0.01-0.14 μg/L）。回收率（75.40%-102.13%）满足精确检测方法的要求。该方法成功用于测定生菜、番茄和黄瓜样品中的马拉硫磷、三唑磷和喹硫磷，表明 3DGA@COFs 材料在预处理蔬菜样品方面具有潜力。
