Preparation strategy of molecularly imprinted polymers adsorbent based on multifunctional carrier for precise identification and enrichment of fenthion.

Due to the existence of organophosphorus pesticides (OPs) in the environment and their potential hazards to ecosystems and human health, this study aimed to develop a novel adsorbent of OPs using multifunctional carriers and surface molecular imprinting technology (SMIT). SiO2-COOH served as a carrier, and molecularly imprinted polymers (MIPs) constituted a shell, creating a core-shell structured adsorbent. SMIT facilitated rapid and efficient binding between the target molecules and the imprinted cavities. The multifunctional SiO2-COOH enhanced the adsorbent's adsorption capacity, improved its mechanical stability, and strengthened the binding with the MIPs. The adsorbent demonstrated excellent specificity and reusability, achieving an adsorption capacity of 54.4 mg/g and the imprinting factor of 2.94. The relative recovery rate in actual sample detection ranged from 95.1% to 108.7%. This study provides a simple and effective method for detecting hazardous factors in environment protection and food safety fields, with significant scientific value and practical application potential.