Abstract:ObjectiveTo study the optimum extration process of polysaccharides from Rubus alceaefolius Poir. MethodsThe content of polysaccharids from Rubus alceaefolius Poir was determined by spectrophotometry at 490 nm.ResultsThe regression equation was Y=0.832 5×+0.022 3,r=0.999 8.The percent of polysaccharide in Rubus alceaefolius Poir was 9.473%.The average recovery rate was 99.69% and RSD was 0.56% (n=6).ConclusionThe method is proved to be simple,accurate and reliable,and it can be used to extract and determine the polysaccharides from Rubus alceaefolius Poir.