Abstract: The polysaccharide has a variety of biological activities, such as anticoagulant activities and antiviral activities. In this paper, extraction conditions of yacon polysaccharides were studied. Objective: To optimize the extraction condition for the polysaccharides from yacon. Mehtods: The single factor tests and response surface methodology (RSM) were applied. Overall research was proceeded by rational design. Technological condition parameters were determined according to regression analysis by Minitab. Results: The optimum condition was as follows: extraction temperature was 83.2℃ extraction, duration was 3.45h, water to material ratio was15.7:1. The optimum extracting rate for the polysaccharide was 3.08%. Conclusion: The RSM is for optimum extraction process and it will improve the extraction conditions of polysaccharides.
Key words:Yacon; Extraction; Response surface method; Single-factor test