A water-compatible magnetic dual-template molecularly imprinted polymer fabricated from a ternary biobased deep eutectic solvent for the selective enrichment of organophosphorus in fruits and vegetables.

A water-compatible magnetic dual template molecularly imprinted polymer using a ternary deep eutectic solvent as a functional monomer was synthesized via a green synthesis method based on one-pot reversible addition/fragmentation chain transfer precipitation polymerization. The resulting material, DES-MDMIP, shows excellent adsorption capacity (218.62 mg g-1) in rapid adsorption time (30 s) and outstanding selectivity factors of 4.45 for organophosphorus pesticides. The sorbent was applied in magnetic solid-phase extraction prior to HPLC analysis. The developed methodology provides linearity between 0.05 and 2000.00 μg L-1. Low detection limits of 0.015-0.030 μg L-1 and enrichment factors of up to 691 were achieved. The applicability of the method facilitates the efficient determination of fruit and vegetable samples with satisfactory recoveries in the range of 80-117%. The newly designed water-compatible DES-MDMIP sorbent, along with a simple and rapid extraction process, demonstrated a powerful analytical approach for the practical analysis of pesticide residues.