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Abstract: A molecularly imprinted polymer was prepared by the molecular imprinting technique using melamine as the template molecular, methacrylic acid as the functional monomer and ethylene glycol dimethacrylate as the cross-linking agent. The binding capacity and selective characteristics of the molecularly imprinted polymer were investigated by equilibrium binding experiments. The results showed that the imprinted polymer exhibited higher adsorptivity and selectivity for melamine compared with the non-imprinted polymer. In addition, the melamine molecularly imprinted polymer was used as sorbent in solid-phase extraction column to isolate the melamine from milk powder and pure milk extracts. The recoveries of melamine from milk powder and milk were in the range of 91% - 103% and 93% - 98% , respectively, with RSDs of 119% and 111% , respectively. The melamine molecularly imprinted polymer showed high selectivity and adsorptivity for melamine, and could be applied in the separation and detection of melamine in milk products.
Template and target information: melamine
Author keywords: Melamine, molecularly imprinted polymer, milk product, Solid-phase extraction