Macromolecular Research, Vol.27, No.11, 1089-1094, November, 2019
Magnetic Molecularly Imprinted Polymer Particles Based Micro-Solid Phase Extraction for the Determination of 4-Nitrophenol in Lake Water
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In this work, magnetic molecularly imprinted polymers (MMIPs) were prepared by the method of co-precipitation polymerization on the surface of vinyl-modified silica magnetic particles. Here, 4-nitrophenol (4-NP) was used as a template and vinylimidazole as a functional monomer. The structural features and morphology of MMIPs were characterized by SEM, FT-IR, TEM and XRD techniques. The results showed that the structures of MMIPs have a layer of silica and MIPs on the surface of the Fe3O4 particles, and they could be rapidly separated from the solution using a magnet. MMIPs possess higher adsorption capacity and excellent selectivity towards template (4-NP) than other structural analogues. And it is found to have good imprinting effect. MMIPs were used as micro-solid phase extraction sorbent for selective separation of 4-NP in lake water sample with high recoveries (90.63?95.63%) and low relative standard deviation values (RSD ≤ 3.2%, n = 3).
Keywords:molecularly imprinted polymers;magnetic separation;micro-solid phase extraction;4-nitrophenol
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