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Abstract: A simple method based on matrix solid-phase dispersion using molecularly imprinted polymers as the sorbent was developed for selective extraction of bergenin from Ardisia japonica. The MIPs were synthesized using bergenin as a template molecule, methacrylic acid as a functional monomer, and ethylene glycol dimethacrylate as a cross-linking agent. The polymers have been characterized by scanning electron microscopy and Fourier-transform infrared spectrometry. The maximum extraction yield of bergenin was obtained with the optimized extraction conditions: 2/1 as the ratio of MIPs to the sample; 8 min as the dispersion time; 10% aqueous methanol as a washing solvent and methanol-acetic acid( 99: 1,V/V) as an elution solvent. The extract obtained was analyzed by high performance liquid chromatography. The result obtained by this method was compared with that obtained by methanol extraction used in Chinese Pharmacopoeia. The results indicated that the extraction yield of bergenin obtained by MIP-MSPD was higher than that obtained by methanol extraction. Moreover,the consumption of the organic solvent and extraction time were reduced in our method,and the selectivity was also improved.
Template and target information: bergein
Author keywords: Matrix solid-phase dispersion, molecularly imprinted polymer, Ardisia japonica, Bergein, liquid chromatography