Preparation of polysaccharides from wax gourd

摘要

Preparation of polysaccharides from the wax gourd was studied. The crude polysaccharides were extracted by ethanol precipitation, and deproteinized by the hydrochloric acid method. The deproteinized polysaccharides were separated by column chromatography to obtain the pure polysaccharides. The pure polysaccharides have a beta-D-pyranosidic bond, and their molecular weight distribution is about 22,500. It was indicated that the final product had much more purity by IR spectrum analysis, UV absorptionspectrum analysis, and phenol-sulfuric acid method, respectively. It was proved that wax gourd polysaccharides were composed of rhamnose, xylose, arabinose, mannose, glucose, and galactose by thin layer chromatography.