The Study of Extraction Technology of Polysaccharide from Millet

The optimization experiment of extraction of polysaccharide from millet was investigated.In the experiment,polysaccharide yield was taken as an index,particle and powder,liquid-solid ratio,extraction time,extraction temperature,extraction times and stirring rate in the extraction process were studied.Based on the single factor experiments,the effects of different extraction temperature,extraction time and liquid-solid ratio on the extraction yield of polysaccharide from millet were optimized with orthogonal design.The result shows that the optimum extraction parameters are as follows: extraction temperature is 70 ℃,extraction time is 2.0 h and liquid-solid ratio is 20:1 at powder,stirring rate 150 r/min and once extracted.Under the optimum conditions,the polysaccharide yield is 7.76 mg/g.