Herba Ephedrae was saturated with 0.5%hydrochloric acid, the extract was extracted with ether and chloroform respectively, from which ephedrine was separated and purified by column chromatography.

• 以0.；5%25盐酸浸泡麻黄草；分别用乙醚、氯仿萃取麻黄粗提物；通过柱色谱法分离提纯麻黄碱。