Chinese Journal of Applied Chemistry

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Preparation and Application of Melamine Magnetic Molecularly Imprinted Solid Phase Extraction Material

LIU Yunan1,2, ZHANG Zhaohui1,2,3*, CHEN Xing1, CHEN Hongjun1, RAO Wei1, CAI Rong1   

  1. (1.Key Laboratory of Hunan Forest Products and Chemical Industry Engineering,
    Jishou University,Zhangjiajie 427000,China;
    2.College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China;
    3.State Key Laboratory of Chemo/Biosensing and Chemometrics,Hunan University,Changsha 410082,China)
  • Received:2013-01-08 Revised:2013-03-11 Online:2013-10-10 Published:2013-10-10

Abstract: A novel melamine magnetic molecularly imprinted polymer(Fe3O4-GO@SiO2@MIP) was prepared based on graphene oxide(GO) using melamine(MEL) as the template molecule, methacrylic acid(MAA) as the functional monomer and ethylene glycol dimethacrylate(EGDMA) as the cross-linker. The Fe3O4-GO@SiO2@MIP was characterized by scanning electron microscope(SEM), transmission electron microscope(TEM), thermogravimetric analysis(TGA) and vibrating sample magnetometer(VSM). The results showed that MEL imprinted layer was grafted on magnetic GO surface successfully. The adsorption properties were investigated by high performance liquid chromatography, and the results demonstrated that the Fe3O4-GO@SiO2@MIP exhibited specific selectivity towards MEL. The maximum adsorption capacity of Fe3O4-GO@SiO2@MIP is 33.11 mg/g, and the selectivity factor of MEL towards CYR and CYA is 2.43 and 2.84, respectively. Combined with magnetic solid phase extraction(M-SPE) and high-performance liquid chromatography with the imprinted material as stationary phase, melamine from the sample solution of milk was successfully separated, enriched and detected.

Key words: Imprinted polymer, Melamine, Magnetic graphene oxide, Magnetic solid phase extraction, High-performance liquid chromatography

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