大黄中有效成分提取分离条件的优化

Optimization of the extraction and isolation for anthraquinone component from rhubarb

目的 :优化从大黄中提取分离大黄蒽醌类有效成分的条件 ,以提高其收率和纯度。方法 :用乙醇回流提取大黄 4次 ,得到粗提取液后 ,用硼酸盐缓冲溶液萃取 ,萃取液经高压制备色谱分离纯化 ,得大黄酸、大黄素、大黄酚单体成分 ,丙酮重结晶后得纯品。色谱柱为YWGC18柱 (4 .6mm× 2 5 0mm ,10 μm)流动相为甲醇 水 高氯酸 (9 1 0 .0 1) ,流速 1.0ml·min-1,检测波长 2 5 4nm。结果 :用高压制备系统可分离纯化大黄蒽醌类有效成分 ,得到大黄酸、大黄素、大黄酚单体成分 ,各成分纯度在 80 %以上 ,大黄素收率达 0 .6%。结论 :醇提法提取大黄蒽醌类有效成分的方法简单 ,提取率高。高压制备系统可分离纯化大黄蒽醌类有效成分 ,得单体纯品 ,且收率高纯度好。

AIM: To optimize the method of extracion and isolation for anthraquinone component from rhubarb for increasing the extraction rate and purity. METHODS: Rhubarb was extracted 4 times in the refluxing method with ethanol. The borate buffer solution was used as extracted fluid. Rhein, rheum emodin and chrysophanol could be obtained by Deltar 4 000 high-pressure making system, and the pure product obtained by recrystallizing with acetone. The YWG C 18 column was (4.6×250) mm, the flow rate 1.0 ml. min -1, and UV detection wavelength 254 nm. Methanol, water and acid perchloride were taken as mobile phase with the ratio of 910.01. RESULTS: Deltar 4000 high-pressure making system could be used to isolate the anthraquinone component from rhubarb, the purity of rhein, rheum emodin and chrysophanol was more than 80%, and the ertraction rate of rheum emodin reached 0.6%. CONCLUSION: The extraction of the anthraquinone component is simple and cheap with ethanol from rhubarb, and the extraction rate is high. Deltar 4000 high pressure making system can be used to isolate the anthraquinone component from rhubarb with a high the extraction rate and purity.