大孔树脂纯化淫羊藿中朝藿定与淫羊藿苷工艺研究

目的考察大孔树脂纯化淫羊藿中朝藿定与淫羊藿苷的最佳工艺条件,并且对最佳工艺富集部位进行初步表征。方法以朝藿定A1、A、B、C及淫羊藿苷为检测指标,采用静态吸附实验对5种大孔树脂进行筛选,通过动态吸附实验考察上柱液质量浓度、最大上样量、上样体积流量、水洗体积、除杂乙醇及洗脱乙醇体积分数、除杂乙醇及洗脱乙醇体积、径高比来优选最佳工艺条件,最后以UPLC-Q-TOF/MS、HPLC、紫外分光光度法对最佳工艺富集部位进行表征。结果确定最佳大孔树脂型号为AB-8,柱径高比为1∶7,以生药0.5 g/mL的淫羊藿上柱液上样6 BV,以6 BV/h的体积流量进行动态吸附,以5 BV水和5 BV 20%乙醇除杂,以6 BV 50%乙醇洗脱,除杂及洗脱体积流量均为6 BV/h。纯化后总黄酮质量分数为63.29%,朝藿定A1、A、B、C及淫羊藿苷总量为40.48%,朝藿定A1、A、B、C及淫羊藿苷质量分数分别为1.63%、2.52%、16.36%、5.51%、14.46%。结论经验证实验,AB-8型大孔树脂纯化淫羊藿中朝藿定与淫羊藿苷的工艺稳定、合理、可行。经化学表征,富集部位主要为黄酮类成分,且黄酮类成分中以朝藿定与淫羊藿苷为主,表明最佳纯化工艺可以用于此类成分的纯化富集。

Purification process of epimedin and icariin from Epimedii Folium by macroporous resin

Objective To investigate the best technological conditions for the purification of epimedin and icariin from Epimedii Folium by macroporous resin, and preliminarily characterize the purification fraction of the best technological conditions. Methods Five kinds of macroporous resins were screened by static adsorption experiment with the content of epimedin A1, epimedin A, epimedin B, epimedin C and icariin as indexes. The best purification conditions were optimized by the concentration of upper column solution, the maximum sample volume, the upper column flow rate, the volume of water washing, the concentration of removing impurity ethanol and elution ethanol, the volume of removing impurity ethanol and elution ethanol, the column diameter-height ratio through dynamic adsorption experiment. Finally, UPLC-Q-TOF/MS, HPLC and ultraviolet spectrophotometry were used to characterize the purification fraction of the best technological conditions. Results The best macroporous resin was AB-8, column diameter-height ratio was 1:7, 6 BV of upper column solution (crude drug 0.5 g/mL) was used for dynamic adsorption at a flow rate of 6 BV/h, 5 BV of water and 5 BV of 20% ethanol were used for impurity removal, and 6 BV of 50% ethanol was used for elution. The flow rate of impurity removal and elution was 6 BV/h. After purification, the total flavonoids content was 63.29%, the total content of epimedin A1, A, B, C and icariin was 40.48%, the content of epimedin A1, epimedin A, epimedin B, epimedin C and icariin was 1.63%, 2.52%, 16.36%, 5.51% and 14.46%, respectively. Conclusion The purification process of epimedin and icariin from Epimedii Folium by AB-8 macroporous resin is stable, reasonable and feasible. The chemical characterization indicated that the purification fraction was mainly flavonoids, mainly consisting of epimedin and icariin. The optimized purification process can be used for the purification and enrichment of such ingredients.