The invention belongs to the technical field of
medicine and discloses a refining method of an effective part of
bitter gourd for reducing
blood sugar, comprising the steps that: (1) the
bitter gourd medicine liquid is prepared before decoloring and refining: the decoction sheet of the
bitter gourd is dried, crushed, extracted in an recycling manner by
ethanol and concentrated to
gain the extract; the extract is diluted, absorbed through big-pore absorbing resin column, washed, eluted with the
ethanol solution to obtain the bitter
gourd medicine liquid before decoloring and refining; (2) a refining process is carried out: the
ethanol eluting solution of the resin column is collected and a discoloring agent is added , the mixing solution is heated and recycled, filtered, concentrated after reducing the pressure, dried in vacuum to obtain the steroidal
glucoside of the bitter
gourd. The steroidal
glucoside of the bitter
gourd extracted by the method of the invention can be directly made into various preparations, such as troche,
capsule, grain, oral liquid, tablet, suspension,
pill, cataplasma and paste, etc. Compared with the traditional technique, the invention is characterized by small volume, strong resistance against
moisture and high content of the effective component. Compared with a
solvent extracting method, the invention does not use organic toxic
solvent which volatilizes easily in the technological flow, thus, the invention has safe and reliable operation, low production cost and no
pollution to the environment.