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Abstract: In this study, molecular imprinted silica nanoparticles were prepared via surface imprinting method for specific recognition with high affinity and separation of paclobutrazol in honey samples. To prepare molecular imprinted silica nanoparticles, paclobutrazol was used as template molecule, 2-hydroxyethyl methacrylate as monomer, 1,2-ethyleneglycoldimethacrylate as crooslinking agent. Furthermore, molecular imprinted silica nanoparticles were synthesized by single electron transfer living radical polymerization. The prepared nanoparticles can be easily separated and collected by ultracentrifuge with 14000 rpm and exhibited highly selectivity to template molecules. All rebinding studies showed that the molecular imprinted silica nanoparticles had excellent recognition towards paclobutrazol. The recoveries of paclobutrazol in the spiked honey samples changed from 98.7% to 99.9% with the relative deviation from 8.62% to 4.92% According to all results, molecular imprinted silica nanoparticles can be good alternative for selective recognition and efficient separation of pesticides in real samples.
Template and target information: paclobutrazol
Author keywords: single electron transfer, living radical, polymerization, paclobutrazol, pesticides, Molecular imprinted, silica nanoparticles