【摘要】 报道一种能有效提高从大黄中提取大黄素收率的方法。首先用氯仿—酸回流4～5h提取大黄蒽醌，再用pH8．0和pH9．9缓冲溶液提取分离大黄蒽醌中的大黄素。大黄素纯品收率达0．52％。更多还原

【Abstract】 A method of increasing the yield of emodin form rhubarb was reported. First of all, the anthraqulnones were extracted from Chinese rhubarb by refluxing with chloroformacid in 4~5hrs. The emodin was isolated from the anthraquinones eltraction by cxtracting with pH 8.0 and pH 9.9 buffer solutions. The yield of emodin was 0.52%.更多还原