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

Abstract

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 FeO@SiO 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 FeO@SiO 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.

A fluorescent microsensor for the selective detection of bifenthrin

“…So far, QD@MIPs, which integrate the excellent optical property of QDs and the high selectivity of MIPs, are widely used by researchers and have proved to be an effective means of analytical detection. [22][23][24] However, reports about MIP-based QDs used to detect BI are very rare.…”