Work

Facile synthesis of a covalent organic framework for efficient solid-phase extraction and analysis of carbamate pesticide residues in fruits

Year: 2026

Type: article

Abstract: A covalent organic framework (COF) material, named COF-RC, was successfully synthesized through a Schiff base condensation reaction between 2,4,6-trihydroxybenzene-1,3,5-tricarbaldehyde and 1,3,5-tris(4-aminophenyl) triazine. The designed COF-RC was employed as a sorbent for the solid-phase extraction of seven carbamate pesticide residues from fruits. The material exhibited high crystallinity, microporosity, excellent stability, and selective adsorption properties, making it an ideal sorbent for carbamate extraction. Various key parameters (elution solvent type and volume, ionic strength, sample pH, COF amount, adsorption and desorption time, and shaking speed) were systematically optimized to maximize extraction performance. The method demonstrated remarkable recoveries (92.7–102.9%) across four distinct fruit matrices. Extracted carbamates were analyzed by UHPLC-MS/MS, achieving excellent linearity (R2=0.999), low limits of detection (0.01–0.051 ng/g), and quantification (0.031– 0.155 ng/g). These results confirm that COF-RC is a highly efficient and reliable sorbent for trace-level carbamate detection in food, offering a promising solution for food safety monitoring.

Source: Food Chemistry X

DOI: 10.1016/j.fochx.2026.104666

Authors: Rana Morsi, Shaikha S. AlNeyadi, Bayan Al-Meetani, Osama Shekhah, Mohammed A. Meetani

Institutions: United Arab Emirates University, King Abdullah University of Science and Technology

Language: English

Topic: Pesticide Residue Analysis and Safety

Subfield: Food Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Responsible consumption and production

Open Access status: gold

Estimated APC paid: $2,330