| 摘要 |
PURPOSE:To prepare a sweetening agent, by purifying an extract obtained from Rubus chingii Hu with a high polymeric synthetic adsorbent resin of the giant network structure, ion exchange resin and an adsorbent resin containing an acrylic ester. CONSTITUTION:Components extracted from the leaf and stem of Rubus chingii Hu is brought into contact with a high polymeric adsorbent resin having the giant network structure to adsorb the active constituents on the resin 4-8pH. The adsorbed constituents are then washed with water and desorbed with a hydrophilic organic solvent, e.g. alcohol. The desorbed constituents are desalted and decolored with an anion exchange resin and a cation exchange resin. The resultant aqueous solution containing 2-20% active constituents is reacted with a synthetic high polymeric adsorbent resin, having the giant network structure, and containing an acrylic ester as a base material to remove components of bitter taste and odors and give the aimed sweetening agent of high purity. |
