Determination of Sulfadiazine Residues in Pork by Molecular Imprinted Column Coupling with High Performance Liquid Chromatography

A method for the quantitative monitoring of sulfadiazine (SD) residues in pork was established by molecular imprinted column coupling with high performance liquid chromatography (HPLC). The molecular imprinted column was selected as an extraction device. To obtain the optimum extraction efficiency, several parameters related to the molecular imprinted column, including column solvent, flow-rate, eluent of the sample matrix and eluent volume, were investigated. The sample solution was directly injected into the device for the extraction after simple extraction. Under the optimum conditions, the relative standard deviations (RSD) was ≤ 6.1%, and the recoveries for SD were higher than 75.6%. In comparison with the AL-SPE column, the MIP-SPE column had good reusability and extraction efficiency. This method was successfully applied to the determination of sulfadiazine residues in pork.