A Magnetic, Core–Shell Structured, pH-Responsive Molecularly Imprinted Polymers for the Selective Detection of Sulfamethoxazole

A magnetic, core–shell structured pH-responsive molecularly imprinted polymer was prepared by surface imprinting technique and free radical polymerization for selective extraction of sulfamethoxazole. The imprinted polymer shell was prepared using 2-(Dimethylamino) ethyl methacrylate as pH-sensitive monomer, a certain amount of 4-vinylphenylbronic acid and methacrylic acid as common monomer to increase selectivity, sulfamethoxazole as template molecules. Excellent adsorption capacity (39.06 mg g −1 ) and selectivity (IF = 2.19) were achieved and the capture/release process can be regulated by pH value. In addition, it has been successfully applied to the detection of sulfamethoxazole in water samples and the recovery rate reached 96.2%. This study provides a new method and idea for the selective separation and detection of sulfamethoxazole in actual samples.