Comparison of three extraction processes for Astragalus polysaccharide

Objective: To select the Optimal method of extraction by using three different methods of extracting Astragalus Polysaccharide.Methods:Macroporous resin water extraction method,water extract-alcohol precipitation and ultrasonic extraction were used to extract polysaccharide,respectively,comparing the three extraction technologies for the extraction rate of Astragalus polysaccharide,and the astragalus polysaccharide content was calculated by using spectrophotometry.Results:The Astragalus polysaccharide extraction rate was 4.186% with the the astragalus polysaccharide content of 26.19% by using Macroporous resin water extraction method and the Astragalus polysaccharide extraction rate was 4.468% with the content of 29.40% by using water extract-alcohol precipitation and the Astragalus polysaccharide extraction rate was 3.420% with the content of 30.95% by using ultrasonic extraction.Conclusion:water extract-alcohol precipitation is the Optimal extraction method for the highest content and extraction rate of Astragalus polysaccharide.