ANYL 67 |
| A water-soluble polysaccharide was isolated from water extract of Cyclocarya paliurus(Batal.)Iljinsk by using ethanol precipitation, deproteination, decolourization and gel-filtration chromatography on DEAE-Sephadex A-25. The homogeneity of water-soluble polysaccharide was proved by gel chromatogrophy on Sepharose CL-6B. The molecular weight of the polysaccharide was determined with the value of 1.2x106 Da by high-performance size-exclusion chromatography (HPSEC). Analysis of monosaccharide composition in water-soluble polysaccharide of Cyclocarya paliurus(Batal.)Iljinsk was performed by gas chromatography with a 30 m DB-1701 capillary column after the polysaccharide was hydrolyzed, reduced and acetylated to sugar alcohol acetates. Nitrogen was used as the carrier gas at a constant flow rate of 0.8 mL/min. The oven conditions included an initial temperature of 230°C and an initial time of 2 min, 15°C/min to 250°C for a 20 min bakeout. The inlet temperature was kept constant at 250°C. The results show that monosaccharide composition in water-soluble polysaccharides of Cyclocarya paliurus(Batal.)Iljinsk is composed of rhamnose, arabinose, xylose, mannose, glucose and galactose with molar ratios of 10.64: 31.23: 3.23: 8.72: 30.16: 16.02. Keywords: Cyclocarya paliurus(Batal.)Iljinsk; monosaccharide; gas chromatography. * Supported financially by Program for Changjiang Scholars and Innovative Research Team in University (No: IRT0540). Corresponding author: Mingyong Xie, Ph.D in Nutrition, Professor in Food Science. |
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General Posters
7:00 PM-9:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Analytical Chemistry |