Extraction Technology on Crude Polysaccharides from Auricularia Auricula

To study the optimal water extraction technology of polysaccharide from Auricularia auricula.The yield was regarded as an examine target.On the basis of single factor tests,orthogonal experiment design was applied to analyze the influence of factors including liquid-solid ratio,extraction time,extraction temperature on the yield of the polysaccharides.Temperature is an important factor for the yield of the polysaccharides.The optimal technology condition was obtained.The liquid-solid ratio was 70,the extraction time was 4 h,the extraction temperature was 100 ℃,the extraction times were 2 times,pH was 7.0.In this condition,the yield of soluble polysaccharides in Auricularia auricula was 32.24 %,the contents of soluble polysaccharides in Auricularia auricula was 64.23 %.