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<p>A novel amino-functionalized magnetic covalent organic polymer (Fe<sub>3</sub>O<sub>4</sub>-NH<sub>2</sub>@TA-BD) for the rapid extraction and detection of carbamate pesticides (CPs) in food is introduced. The magnetic covalent organic polymer (M-COP) was synthesized under mild conditions (40&#xa0;°C). It is characterized by abundant adsorption sites, porous structure, and π-conjugated network, enabling superior adsorption capacities of 89.60–247.73 mg g<sup>− 1</sup> for nine CPs. Coupled with HPLC-MS/MS, the method demonstrates satisfactory accuracy, sensitivity and precision, with recoveries ranging from 80.80% to 101.87% and limits of detection (LODs) between 0.005 and 0.02&#xa0;µg kg<sup>− 1</sup>. Additionally, the adsorbent is reusable for at least eight cycles with stable performance. Compared to existing methods, it offers shorter extraction times and lower LODs, making it suitable for rapid and sensitive detection of CPs in food samples. This study provides a reliable and environmentally friendly approach for monitoring pesticide residues in food matrices, enhancing food safety and public health.</p> Graphic abstract <p></p>

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Green synthesis of a novel amino-functionalized magnetic covalent organic polymer for rapid and sensitive detection of carbamate pesticides in food

  • 期刊论文

  • 发表日期：

    2026年3月14日

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  • Yingqi Xu,
  • Tong Liu,
  • Xiujuan Wang,
  • Xiuli Xu,
  • Feng Zhang,
  • Qingli Yang,
  • Xiudan Hou

摘要

A novel amino-functionalized magnetic covalent organic polymer (Fe3O4-NH2@TA-BD) for the rapid extraction and detection of carbamate pesticides (CPs) in food is introduced. The magnetic covalent organic polymer (M-COP) was synthesized under mild conditions (40 °C). It is characterized by abundant adsorption sites, porous structure, and π-conjugated network, enabling superior adsorption capacities of 89.60–247.73 mg g− 1 for nine CPs. Coupled with HPLC-MS/MS, the method demonstrates satisfactory accuracy, sensitivity and precision, with recoveries ranging from 80.80% to 101.87% and limits of detection (LODs) between 0.005 and 0.02 µg kg− 1. Additionally, the adsorbent is reusable for at least eight cycles with stable performance. Compared to existing methods, it offers shorter extraction times and lower LODs, making it suitable for rapid and sensitive detection of CPs in food samples. This study provides a reliable and environmentally friendly approach for monitoring pesticide residues in food matrices, enhancing food safety and public health.

Graphic abstract