Optimization on extracting process for Elaeagnus angustifolia polysaccharide in Gansu

Extraction conditions were optimized using water extraction and alcohol deposition to extract Elaeagnus angustifolia polysaccharide.The effects of three factors such as extraction temperature,the proportion of water volume and extraction time were investigated.With the orthogonal design,the optimum technologic conditions of Elaeagnus angustifolia polysaccharide were obtained as follows:adding 60 times water as much as Elaeagnus angustifolia in 85 ℃ for 2 hours.The contents of polysaccharide from Elaeagnus angustifolia L.in Gansu was up to 4.98% in the optimum conditions.