[Separation, purification and spectrum analysis of SHP].

Crude SHP was obtained from extracting with hot water and precipitating with ethyl alcohol. Free proteins were removed by trypsinase combined with Sevage method. Different fractions were got by gel filtration chromatography. The molecule structure was analyzed by ultraviolet spectrum scanning and KBr infrared spectroscope. The results showed that the reaction of phenol-sulfuric acid was postiive, reaction of ninhydrin was weak positive and reaction of iodine-potassium iodide was negative, the extraction was regarded as a non-starch polysaccharide. Extraction rate of SHP was 8.56% and the content of polysaccharides was 90.96%. Gel filtration chromatography showed that SHP composed of furanopolysaccharides, xylose, galactose, arabinose, glucose, rhamnose and fructose. Ultraviolet spectrum showed that SHP contained little DNA and protein, infrared spectrum showed that SHP was main furanopolysaccharides and had beta-glycosidic bouds in its molecule structure, and there was a characteristic absorb peak of at-D-galactopyranosyl in it.

[Separation, purification and spectrum analysis of total flavonoids from Cercis chinensis].

OBJECTIVE: To separate, purify total flavonoids from Cercis chinensis Bge and analyze their flavonoid aglycones and content by spectrum method. METHODS: The total flavonoids from Cercis chinensis Bge were extracted by 15 volume of 55% ethyl alcohol and hot water refluence at 100 degrees C and separated, purified by polyamide resin chromatography. Based on reference substances of rutin, quercetin, kaempferol, it was analyzed and detected by UV-Vis spectroscope at 200-600 nm and by KBr infrared spectroscope at 400-4000 cm(-1). RESULTS: Average extraction rate of crude total flavonoids was 7.32% , and extraction rate of purified total flavonoids was 2.20%. The results of UV-Vis and IR scanning spectrum showed that purified total flavonoids from Cercis chinensis Bge contained of 3 kinds of flavonoid aglycones of rutin, quercetin, kaempferol, and their content was 0.8271, 0.2169, 0.3007 mg/ml respectively. CONCLUSION: Content of total flavonoid aglycones in purified flavonoids of Cercis chinensis Bge was 24.30%, and content of total flavonoid was 0.5346%.

[Extraction and analysis of sargassum hemiphyllum polysaccharides].

Sargassum hemiphyllum polysaccharides (SHP) was extracted by thermal water method and the physical and chemical characters, the extraction rate, contents, compositions of SHP was studied. The result showed that SHP was ashen powder, water-soluble, insoluble in organic solvents. The reaction of iodide-potassium iodide was negative to evaluate that SHP was nonstarch polysaccharides. Extraction rate was 7.04% and the content of polysaccharides was 82.9%. Ultraviolet spectrum showed that there were little DNA and protein. Infrared spectroscopy showed that SHP was main pyrano polysaccharides and had beta-linked glycopolysaccharides in molecule structure of SHP. Thin layer chromatography traced that SHP could be xylan. The results indicated that the extract was not only polysaccharides but also higher purity and the method was high efficiency.