小檗皮总生物碱提取物的大孔树脂纯化工艺与质量标准考察

目的:优选小檗皮总生物碱提取物的大孔树脂纯化工艺,并建立其质量标准,为该有效部位的制剂开发提供参考。方法:采用酸性染料比色法考察小檗皮总生物碱提取物的纯化工艺,考察的工艺参数包括上样液质量浓度、上样速度、树脂柱径高比、水洗用量、洗脱剂体积分数及用量、洗脱流速等。采用HPLC测定小檗皮总生物碱提取物中4种生物碱类成分(木兰花碱、盐酸药根碱、盐酸巴马汀、盐酸小檗碱)的含量,流动相乙腈-0. 1%磷酸水溶液梯度洗脱,检测波长270 nm,确定最佳纯化工艺。按2015年版《中国药典》的要求进行小檗皮总生物碱纯化物的薄层色谱鉴别、含量测定、特征图谱等质量标准研究。结果:小檗皮总生物碱提取物的最佳纯化条件为采用HPD100型大孔树脂10 g,树脂柱径高比1∶8,上样液质量浓度11 g·L~(-1),上样液体积50 mL,上样流速1 mL·min~(-1),加4 BV水洗脱(1 BV=15 mL),加30%乙醇9 BV洗脱;纯化后小檗皮总生物碱的转移率 80%,纯度 65%。建立了小檗皮总生物碱纯化物的质量标准,特征图谱中共有峰有19个,整体相似度均 0. 99。结论:优选的纯化工艺稳定可行,建立的质量标准可靠,适用于小檗皮总生物碱提取物的纯化及质量控制。

Optimization of Purification Process of Total Alkaloid Extract of Berberis dictyophylla Cortex by Macroporous Resin and Investigation of Its Quality Standard

Objective: To optimize purification process of total alkaloid extract of Berberis dictyophylla cortex by macroporous resin,and to establish its quality standard. Method: Acid dye colorimetry was used to investigate the purification process of total alkaloid extract of B. dictyophylla cortex,the process parameters included concentration of sample solution,speed of sampling,diameter-height ratio of resin column,water washing amount,concentration and dosage of eluent,flow rate of elution,etc.In order to determine the optimum process,HPLC was employed to determine the contents of four alkaloids(magnoflorine,jatrorrhizine hydrochloride,palmatine hydrochloride,and berberine hydrochloride) with mobile phase of acetonitrile-0.1% phosphoric acid aqueous solution for gradient elution and detection wavelength at 270 nm.After being purified,quality standard of total alkaloid extract of B. dictyophylla cortex was investigated according to the requirements in the 2015 edition of Chinese Pharmacopoeia. Result: Optimal purification conditions were as following:10 g of HPD100 macroporous adsorption resin with a column diameter-height ratio of 1:8,sampling solution concentration of 11 g·L^-1,the loading flow rate of 1 mL·min^-1,sampling solution volume of 50 mL,washed with 4 BV of water(1 BV=15 mL) and added 9 BV of 30% ethanol,after being purified,the transfer rate of total alkaloids was>80%,and its purity was>65%.The quality standard of total alkaloid extract of B. dictyophylla cortex was established,there were 19 common peaks in the characteristic chromatogram,and the overall similarity was>0.99. Conclusion: This optimized purification process is stable and feasible, and the established quality standard is controllable.