Studies on the Extraction Technology of Erberry Leaves Polysaccharide

Polysaccharide was extracted from the leaves of erberry(Sambucus williamsii) using water as extract solution.The phenol-sulfuric acid method was adopted to determine the content of polysaccharide.The effects of factors including extraction temperature,extraction time,mass ratio of material to water,concentration of alcohol used for deposition,extraction times and pH of extract system on the yield of polysaccharide were studied by single factor tests.And orthogonal design was adopted to optimize the extraction technology.The optimized extraction conditions were,extraction temperature,75 ℃;Extraction time,3 h;Mass ratio of material to water,1∶30;Concentration of alcohol(volumn ratio),80%,and the yield of polysaccharide could be 15.52%.