Extraction of Polysaccharides from Morinda officinalis How Residue

In order to utilize the discarded residue,the extraction conditions for polysaccharides in the discarded residue of Morinda officinalis How were investigated.With the yield of polysaccharides as index,the effects of several factors such as temperature,time,ratio of solid to liquid and times on the extraction of polysaccharides from M.officinalis residue were invstigated using single factor analysis.On the base of the single factor analysis,the optimal the extraction conditions were obtained by orthogonal analysis.The results showed that temperature and times were the major factors which affecting the extraction of polysaccharides,time and ratio of solid to liquid were the secondary ones.The best conditions for extraction were: distilled water extraction time 1 h,temperature 100 ℃,ratio of solid to liquid 1:7(m/V).and extracting times 2.Under these conditions,the yield of M.officinalis polysaccharides was 15.67%.The process was reproducible with high yield of polysaccharides.