Abstract: Based on molecularly imprinted polymer (MIP) recognition, a competitively, highly sensitive and fully reversible flow-through chemiluminescence sensor was developed for the determination of sulfadiazine (SD). The MIP with a diameter of 1~10 μm was synthesized by suspension polymerization using SD as the target.A polytetrafluoroethylene (PTFE) tube, in which MIP particles were prepacked, was connected into the sampling loop of an eight-way injection valve and served as both a MIP column for on-line selective adsorption of SD and chemiluminescence reactor. Under the optimal conditions, the CL intensity has a linear relationship with the concentration of SD in the range of 7.0 x 10-9 ~ 9.0 x 10-7 g/mL with a detection limit of (3σ) 3 x 10-10 g/mL. The relative standard deviation is 3.4% for 3.0 x 10-8 g/mL SD (n =11). The present method is stable during half a year and the selectivity and sensitivity of this method is higher than those by the methods previously reported. The method has been applied to direct determination of SD in animal tissues for food safety.
Template and target information: sulfadiazine, SD