目的 建立高速逆流色谱分离纯化草豆蔻中山姜素和小豆蔻明的方法。方法 使用正己烷-醋酸乙酯-甲醇-水(5∶5∶7∶3)为两相溶剂系统,上相为固定相,下相为流动相,体积流量2.0 mL/min,转速800 r/min,温度25℃,固定相的保留率为50%,检测波长300 nm,对草豆蔻粗提物进行分离。结果 从100 mg草豆蔻粗提物中一步分离纯化得到17.2 mg山姜素和25.1 mg小豆蔻明。经HPLC分析,质量分数分别为98.1%、99.2%,其化学结构由1H-NMR和13C-NMR鉴定。结论 与传统的、存在不可逆吸附现象的柱色谱法相比,高速逆流色谱分离纯化草豆蔻中山姜素和小豆蔻明的方法具有简单、高效、回收率高等优点。

Objective The aim of the study was to establish a high speed counter-current chromatography (HSCCC) method for the isolation and purification of alpinetin and cardamomin from Alpinia katsumadai. Methods Two-phase solvent system composed of n-hexane-ethyl acetate-methanol-water (5:5:7:3) was used. The flow rate of the mobile phase was 2.0 mL/min, the revolution speed was 800 r/min, the separation temperature was controlled at 25 0C, the reservation ratio of the stationary phase was 50%, and the detection wavelength was 300 nm. Results Alpinetin (17.2 mg) and cardamomin (25.1 mg) could be obtained from 100 mg of the crude extract in one-step separation by the method. The purities of them were 98.1% and 99.2%, respectively, as determined by HPLC and their chemical structures were identified by 1H-NMR and 13C-NMR. Conclusion The traditional method, column elution, could not eliminate irreversible adsorption, while the HSCCC method used for the isolation and purification of alpinetin and cardamomin from A. katsumadai has many advantages, such as facility, high efficiency, and high recovery as well.

聊城大学科研基金资助项目(X091008)