Optimization of the Extract Technology of the Polysaccharide from Codonopsis tangshen by Orthogonal Experiment

[Objective] The aim was to study on the optimum extraction process for the polysaccharide water extraction from CHANGII RADIX.[Method] L9(34) orthogonal test was used to select the optimum extraction condition for polysaccharide in CHANGII RADIX with polysaccharide content as the index.[Result] The optimum process for polysaccharide water extraction from CHANGII RADIX was 1∶30 solid-liquid ratio,75 ℃ extraction temperature,three times of extraction,and 2 h extraction time.And the yield rate of polysaccharide was as high as 21.73%.[Conclusion] This method was reasonable,steady and feasible and could be used as an extraction method for polysaccharide extraction from CHANGII RADIX.