Abstract:In this study, the characteristics of different Sinkiang Glycyrrhizas were compared by determining the contents of glycyrrhiza acid and glycyrrhiza polysaccharide. And the extraction conditions of glycyrrhiza polysaccharide were investigated via single factor and orthogonal experiments. The results showed that the side branches of planted Glycyrrhiza contained 2.9% glycyrrhiza acid and 5.0% glycyrrhiza polysaccharide, which were higher than those in the trunks (glycyrrhiza acid 2.2% and glycyrrhiza polysaccharide 3.5%). In the wild glycyrrhiza, the highest contents of glycyrrhiza acid and glycyrrhiza polysaccharide were 2.4% and 3.3%, respectively. Ten years old wild glycyrrhiza contained 2.4% glycyrrhiza acid and glycyrrhiza polysaccharide. For the extraction of glycyrrhiza polysaccharide, the most suitable ratio of solid to liquid, extracting temperature, time and times were found to be 1:30, 90 ℃, 0.5 h and twice, respectively.
