Study on microwave-assisted extraction of Chinese yam polysaccharides

Using the dried flakes as raw material and ethanol as the precipitation reagents,microwave-assisted polysaccharide extraction of Chinese yam was studied.The optimal extraction process conditions determined by orthogonal experiments were: microwave power 640W,treating time 10 min,solid-liquid ratio 1∶10,and exaction 3 times.Under these conditions,the yields of crude yam polysaccharide and yam polysaccharide were 8.35% and 53.19%,respectively.