金丝小枣中多糖的提取

Extraction of Polysaccharide for Watkins Jujube

以金丝小枣为材料,研究了多糖提取的最佳条件。枣汁通过脱色、浓缩、乙醇沉淀、干燥得到多糖,其中脱色的最佳条件为活性碳的质量分数为1.0%,脱色1.5 h,温度为90℃,脱色2次。乙醇沉淀的最佳条件是加入体积分数95%的乙醇至体积分数为60%,沉淀1.5 h,冷冻干燥法进行干燥,得到多糖的提取率为1.2%。

The main material is watkins jujube,and the best conditions of the extract of polysaccharide is considered.The polysaccharide can be obtained from jujube juice by decolourizating,concentrating,alcohol-precipitating and drying.The best conditions of decolourizating are as follows： activity carbon content is 1.0%,temperature is 90 ℃,and decolorizate two times is 1.5 h.The best conditions of alcohol-precipitating are using 95% ethanol whose volume fraction is 60%,precipitating by 1 h, and being dried by freeze drying.The extraction yielding of polysaccharide is 1.2%.