Study on Extraction and Separation Technique of Yam Polysaccharide

The optimum extraction conditions obtained by the method of water extracting and the orthogonal array experiment are:extracting time t=90 min,extracting temperature T=90℃,material-water ratio m/V=1:5 g/mL.The higher yield can be obtained by extracting-assisted of microwave pretreatment and ultrasonic pretreatment.The results also show that the Savage method is preferable to trichloroacetic acid precipitation method in removing protein of YPS.