A natural esculin-based hydroxyl functionalized polymer for efficient enrichment of diamide insecticides residues in...

A green and hydroxyl functionalized hypercrosslinked polymer (Esc/BCMBP_1:2-HCP) was synthesized for solid-phase extraction (SPE) of diamide insecticides by using natural esculin as monomer for the first time. It exhibited an excellent adsorption performance for the diamides. The major SPE influencing parameters were investigated, and then, a new analytical approach coupling the Esc/BCMBP_1:2-HCP based SPE with HPLC-DAD detection was developed for the analysis of the diamide insecticides. Under optimal conditions, a good linearity was achieved in the analytes concentration range of 0.2-100.0 ng mL^-1, 3.0-500.0 ng g^-1, and 3.0-500.0 ng g^-1 for water, rice and soil samples, respectively, with the coefficients of determination>0.9936. The limits of detection were in the range of 0.06-0.30 ng mL^-1, 0.90-1.60 ng g^-1 and 0.80-1.80 ng g^-1, respectively. The method recoveries for the spiked samples were from 87.0 % to 111 %, with the relative standard deviations < 7.5 %.