The invention relates to Chinese date
polysaccharide and a method for extracting and purifying the Chinese date
polysaccharide. The method for extracting and purifying the Chinese date
polysaccharide comprises the following concrete steps: carrying out Soxhlet extraction on smashed dried Chinese date, volatilizing and
drying residue and then extracting with boiled water, carrying out concentration and
centrifugation on a boiling water extracting solution, taking supernate and carrying out
alcohol precipitation, standing, centrifuging again, collecting precipitate, dissolving with
distilled water after washing, then adding 0.1-0.2% of
papain, placing in water bath at the temperature of 50 minus or plus 5 DEG C for 2-4 hours, removing
protein by adopting a Sevage method, decolorizing with
activated carbon and then carrying out reduced pressure concentration, cooling, carrying out
dialysis with running water, carrying out
alcohol precipitation and standing again after
dialysis is finished, and
drying precipitate at the temperature of 60-70 DEG C, so that the Chinese date polysaccharide is obtained. Tests prove that the Chinese date polysaccharide has good physical and
sensory organ moisture retaining effects on cigarette, can be used for reducing the
irritation and offensive odour of the cigarette and improving the mellow and full sense and comfort of
smoke of the cigarette and can serve as a tobacco
humectant with excellent performance.