Recognition and fast separation of Paclobutrazol pesticides via molecular imprinted silica nanoparticles

Abstract

In this study, molecularly imprinted silica nanoparticles was prepared with surface imprinting method for specific recognition with high affinity and separation of paclobutrazol in honey samples. To prepare molecularly imprinted silica nanoparticles, Paclobutrazol was used as template molecule, 2-hydroxyethyl methacrylate as monomer, 1,2-ethyleneglycoldimethacrylate as crooslinking agent. Furthermore, MIP SNPs were synthesized by single electron transfer living radical polymerization. The prepared nanoparticles can be easily separated and collected by ultrasantrifuge with 140000 rpm and exhibited highly selectivity to template molecules. All rebinding studies showed that the MIP SNPs had excellent recognition towards Paclobutrazol. The recoveries of PB in the spiking honey samples changed from 98.7% to 99.9% with the relative deviation from 8.62% to 4.92% According to all results, MIP SNPs can be good alternative for selective recognition and efficient separation of pesticides in real samples.

Keywords

• : single electron transfer living radical polymerization,Paclobutrazol,pesticides,molecularly imprinted

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