Chemical Composition of Bark of Guangyechu

The preliminary study on chemical composition of Guangyechu through the technology of test tube and paper chromatography was accomplished.The result showed that bark of Guangyechu contains phenols,amino acids,proteins,polypeptides,saccharides,ploysaccharides and its glycosides,saponins,flavonoids and its glycosides,steroids,triterpenoids and so on.And then the content of the active components were determined.Quantitative results of routine nutritional components were assaged as proteins 7.78%,lipid 1.73%,fibre 27.9%,total amino acid 6.75%,in which 38.0% was essential amino acids.The trace elements Fe,Mn,Zn,Cu were 77.5,13.2,16.8,12.1(μg/g) while the normal elements K,Ca,Mg were 11.1,8.90,1.81(mg/g).The content of total flavonoids was determined by ultraviolet-visible spectrophotometry.The content of total flavonoids is 1.485%.The result indicates that the bark of Guangyechu is of high potentiality to be exploited.