The invention discloses a decolorizing method for a Huping jujube
polysaccharide solution. The decolorizing method concretely includes the steps that 1, peel and pit removing is performed on Huping jujubes, paste making is performed after the Huping jujubes are
cut into slices, and a vacuum
freeze drying technology is adopted for
drying treatment to obtain Huping jujube
powder; 2, a certain amount of jujube
powder is weighed, and through the steps of extracting, concentrating,
alcohol precipitation,
alcohol washing and others, crude polysaccharides is obtained; 3, crude polysaccharides are redissolved in
distilled water, three decolorizing agents including macroporous adsorption resin,
active carbon and
polyamide resin are added for decolorizing, and D900 type macroporous adsorption resin is sieved out to serve an ideal decolorizing agent; 4, crude polysaccharides are redissolved in a buffering solution, and through D900 type macroporous adsorption resin, decolorizing, concentrating and
drying are performed to obtain Huping jujube polysaccharides, wherein the PH value of the buffering solution is 11-12. By the adoption of the decolorizing method, the Huping jujube crude
polysaccharide solution is convenient and easy to decolorize, no harmful chemical substances are introduced, one-off decolorizing rate can reach 80-90%, the
retention rate of polysaccharides can reach 80-90%, and deproteinization rate can also reach 30-40%. Resin can be recycled in a renewable mode, the requirements for the cost and equipment are low, and industrialized production of Huping jujube polysaccharides is facilitated.