| abstract |
An aqueous two-phase system for extracting glycosides from a herb includes the extractive solution, about 5 wt %-30 wt % of salt, about 5 wt %-30 wt % of polyol and about 0.5 wt %-30 wt % of alcohols. The salt can be dihydrogen phosphate, hydrogen phosphate and phosphate or a mixture thereof, and it also can be sulfates, chlorides, oxalates, or acetates. In addition, a process for extracting glycosides using an aqueous two-phase system is disclosed. The procedures includes preparation of extractive solution, concentration and drying, phase separation, concentration of the water layer and drying, washing with solvent, sonication, centrifugation, concentration of filtrate and drying of the final products. |