Search

[Display omitted] In this work, a novel magnetic hyper-crosslinked polymers (EA-MHCP1) was facilely synthesized by using biogenic ellagic acid (natural polyphenol) as monomer for the first time. The EA-MHCP-1 showed high extraction capacity toward neonicotinoid pesticides. Thus, it was applied as efficient sorbent to simultaneously extract four of the most frequently used neonicotinoids from environmental water and lettuces, followed by high performance liquid chromatography-diode array detection. This work provided a fast, reliable and sensitive tool for neonicotinoids detection. • A novel magnetic HCP (EA-MHCP) was facilely synthesized using biogenic ellagic acid. • EA-MHCP showed large adsorption capacity and fast adsorption rate to neonicotinoids. • H-bond and Lewis acid-base interaction may be the main adsorption mechanism. • EA-MHCP was applied as MSPE sorbent to detect neonicotinoids in water and lettuce. • EA-MHCP exhibited good application prospect for organic compounds with big polarity. Three hydroxyl-functionalized magnetic hyper-crosslinked polymers (EA-MHCPs) were facilely synthesized using biogenic ellagic acid (EA) as monomer for the first time. The EA-MHCP1 possessed large surface area, good magnetism and excellent extraction capability toward neonicotinoids. Thus, an EA-MHCP1 based magnetic solid phase extraction method coupled with HPLC was developed for simultaneous analysis of four neonicotinoids in water and lettuce samples. At optimized conditions, excellent linear response (R2 ≥ 0.9990) was observed in the range of 0.06–100 ng mL−1 for water and 2.5–250 ng g−1 for lettuce. Low detection limits (S/N = 3) were obtained over the range of 0.02–0.03 ng mL−1 for environmental water and 0.8–3.2 ng g−1 for lettuce samples. Good method recoveries ranging from 80.0 % to 116 % were obtained, with relative standard deviations below 7.1 %. This work provided a robust analysis method for sensitively determining neonicotinoid residues in real samples. [ABSTRACT FROM AUTHOR]