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Citation: SUN Zhi'an, QI Yuxia, WANG Xia, ZHOU Yanqiang, GONG Bolin. Preparation of magnetic surface molecularly imprinted polymers for melamine and its application in milk samples[J]. Chinese Journal of Chromatography, ;2018, 36(8): 716-722. doi: 10.3724/SP.J.1123.2018.03033 shu

Preparation of magnetic surface molecularly imprinted polymers for melamine and its application in milk samples

School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan 750021, China

Received Date: 27 March 2018

Fund Project: National Natural Science Foundation of China (Nos.21565001, 31271868).

By using melamine (MEL) as the template molecule, magnetic surface molecularly imprinted polymers (MMIPs) were prepared. Methacrylic acid (MAA) was chosen as the functional monomer, and ethyleneglycol dimethacrylate (EGDMA) was chosen as the cross-linker, and Fe₃O₄@SiO₂ was used as the magnetic supporter. Transmission electron microscope (TEM), thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR) analysis and a vibrating sample magnetometer (VSM) were used to characterize the polymers. An imprinted polymer layer was found on the surface of the Fe₃O₄@SiO₂ nanomaterials. MMIPs were applied to extract and enrich melamine in milk samples. The specific recognition capability of the material was confirmed by high performance liquid chromatographic (HPLC) analysis. Thus, a simple and selective method was successfully established using MMIPs as sorbents to detect melamine in milk with satisfactory results.
- high performance liquid chromatography (HPLC),
- magnetic surface molecularly imprinted polymers (MMIPs),
- Fe₃O₄ nanoparticle,
- melamine,
- recognition character,
- preparation
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