Abstract: A molecularly imprinted polymers was synthesized using methacrylic acid (MAA) as functional monomers, ethylene glycol dimethacrylate (EDMA) as crosslinker, the mixture of toluene and dodecadol as porogenic reagent and 2, 4-dichlorophenoxyacetic acid (2, 4-D) as template molecules by in situ thermal-initiated polymerization method, and a monolithic column (MTC) was prepared as the stationary phase of high performance liquid chromatography (HPLC). The polymers were characterized with infrared spectra, scanning electron microscopy (SEM) and surface area analysis, respectively. The trends of retention factors of imprinted and blank MTC were investigated under different conditions. Effects of methanol content, pH and flow rate on the separation performance of molecularly imprinted monolithic columns (MIMC) were also discussed. The result showed that the stationary phase of MIMC obtained from the optimization conditions could completely separated 2, 4-D and its analogues phenoxyacetic acid in 15 min with separation factor of 1.52. The MIMC was applied in the separation of 2, 4-D from the distill liquid of orange with satisfactory results. (Analytical Abstracts 2010)
Template and target information: 2, 4-dichlorophenoxyacetic acid, 2,4-D
Author keywords: 2,4-dichlorophenoxyacetic acid, in situ thermal-initiated polymerization, monolithic column, HPLC