“利血平”是一个非常弱的硷,因此能在酸性液中用氯仿来提取,经采用直接重結晶,色层分析和逆流分配等方法,可获得純的游离的利血平。本文将比较四种从蘿芙木Rauwolfia serpentina根中分离利血平的方法。①法:从一公斤生药所得之甲醇提取液,減压浓縮至干,所得残渣用5％醋酸液提取,酸液用石油醚除去基中脂肪后,再用氯仿提取,经真空干燥所得残渣以苯提取,苯液进行色 “Reserpine” is a very weak quinone, so it can be extracted with chloroform in acid solution. Pure free reserpine can be obtained by direct recrystallization, chromatographic analysis and countercurrent distribution. This article will compare four methods for separating reserpine from the root of Rauwolfia serpentina. 1 Method: The methanol extract obtained from one kilogram of crude drug was concentrated under reduced pressure to dryness. The residue was extracted with 5% acetic acid solution. The acid was removed with petroleum ether and then extracted with chloroform. The residue was vacuum-dried. With benzene extraction, benzene solution for color