Method for extracting ephedrine from herba ephedrae

The invention relates to the technical field of biological medicines, in particular to a method for extracting ephedrine from herba ephedrae, which comprises the following steps: mixing herba ephedraewith ethanol, and extracting ephedrine from herba ephedrae at 75-85 DEG C to obtain an ephedrine-containing extracting solution with the concentration of 30-50%. According to the method for extracting ephedrine from herba ephedrae provided by the invention, ephedrine is extracted from herba ephedrae by using low-concentration ethanol, so that the extraction rate of ephedrine is increased, the useof acid water and the damage of acid water to equipment are avoided, and the method is green and environment-friendly. 本发明涉及生物医药技术领域，具体涉及一种从麻黄草中提取麻黄碱的方法，包括以下步骤：将麻黄草与乙醇混合，在75～85℃下提取麻黄草中的麻黄碱，获得含有麻黄碱的提取液，其中，所述乙醇的浓度为30～50％。本发明提供的从麻黄草中提取麻黄碱的方法，通过从麻黄草中以低浓度乙醇提取麻黄碱，即提高了麻黄碱的提取率，又避免了酸水的使用及其对设备的损害，绿色环保。