TREATMENT METHOD FOR IMPROVING SAPONIN FROM AERIAL PART OF PANAX NOTOGINSENG

The present invention discloses a treatment method for improving saponins from the aerial part of Panax nologmseng. The treatment method includes the following steps: (l) coarsely grinding dried aerial parts of P. nologl'nseng, mixing into water, ethanol or a solvent in which water and ethanol are mixed in any proportion, and filtering after heat reflux extraction for 0.5-4 h at 40-100°C, to obtain filter residues; (2) extracting the filter residues 1-3 times under the same conditions of the heat reflux extraction in step (1), where each extraction lasts for 1-3 h, to obtain an extract; filtering the extract, and concentrating to 1/5-1/20 of the original volume of the combined solution under reduced pressure, to obtain a concentrated solution, (3) adding alumina into the concentrated solution for reaction for 8-24 h at 60-100°C, and filtering to obtain a supernatant and alumina precipitates, (4) eluting the alumina precipitates with a solvent to obtain an eluent, where the solvent is an ethanol solution, an acid solution of ethanol or an alkali solution of ethanol, and (5) combining the supernatant with the eluent, concentrating to dryness under reduced pressure, and adding water until the volume is equal to that of the concentrated solution in step (2).