[Improvement on microwave technology of extracting polysaccharide from yacon leaves].

According to the extraction ratio of polysaccharide in yacon leaves, the comparison between microwave extraction and traditional hot water extraction was conducted, and the two-factor and three-level experiment on the microwave extraction of polysaccharide from yacon leaves was investigated. The result showed that the extraction ratio of polysaccharide by using microwave extraction was better than that by using traditional hot water extraction. Moreover, according to the result of variance analysis and multiple comparison, the optimum conditions for extraction of polysaccharide by using microwave technology from yacon leaves were as follows: 280W microwave power for 2 times and 15 minutes at every time.