Research on extraction technology of Lycium barbarum polysaccharides by the alkaline solution

【Objective】 The study was done to search for a new advanced method used for extracting Lycium barbarum polysaccharids(abbreviaton is LBP) on the basis of the traditional water extraction technology.【Method】 Single-factor and orthogonal experiments were adopted to establish the optimal conditions for the extraction of LBP from Ningxia wolfberry.The yield of LBP was regarded as index,the optimum technology parameters finally were gotten,and the superiority of alkaline solution extraction technology to traditional water extraction technology was analyzed.【Result】 The optimum alkaline solution extraction process conditions was as follows:under the ratio liquid to solid 70∶1,pH 10,at 65 ℃,extracted in soakage for 3.5 hours.The sequence of factors that worked on the yield of LBP were as below:extracted temperaturepHthe ratio of liquid to solidextracted time.【Conclusion】 The optimal alkaline solution extraction conditions were determined.On the conditions the yield of extraction was 7.46%,1.59% more than that of traditional water extraction technology.