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中国精品科技期刊2020
许丽宾, 郑凌君, 卢旭, 郭睿, 郑宝东, 曾绍校. 余甘多糖分离纯化及其分子结构的研究[J]. 食品工业科技, 2015, (12): 127-132. DOI: 10.13386/j.issn1002-0306.2015.12.018
引用本文: 许丽宾, 郑凌君, 卢旭, 郭睿, 郑宝东, 曾绍校. 余甘多糖分离纯化及其分子结构的研究[J]. 食品工业科技, 2015, (12): 127-132. DOI: 10.13386/j.issn1002-0306.2015.12.018
XU Li-bin, ZHENG Ling-jun, LU Xu, GUO Rui, ZHENG Bao-dong, ZENG Shao-xiao. Study on the separation, purification and molecular structure characterization of Phyllanthus emblica L. polysaccharide[J]. Science and Technology of Food Industry, 2015, (12): 127-132. DOI: 10.13386/j.issn1002-0306.2015.12.018
Citation: XU Li-bin, ZHENG Ling-jun, LU Xu, GUO Rui, ZHENG Bao-dong, ZENG Shao-xiao. Study on the separation, purification and molecular structure characterization of Phyllanthus emblica L. polysaccharide[J]. Science and Technology of Food Industry, 2015, (12): 127-132. DOI: 10.13386/j.issn1002-0306.2015.12.018

余甘多糖分离纯化及其分子结构的研究

Study on the separation, purification and molecular structure characterization of Phyllanthus emblica L. polysaccharide

  • 摘要: 分离纯化余甘多糖(Pe Ps),并研究其理化性质和结构特征。采用热水浸提法提取余甘粗多糖,经DEAESephadex A-25柱层析分离得到两种不同多糖组分。综合运用硫酸-苯酚、硫酸-咔唑、碘-碘化钾等化学分析方法对多糖的理化性质进行分析;采用高效液相色谱法鉴定组分的均一性及其分子量(Mw),并用气相色谱法测定组分的单糖组成;利用紫外光谱、红外光谱、旋光度研究多糖组分的结构特征。结果表明:余甘粗多糖经纯化分级后得到两种均一的多糖组分:Pe PsⅠ和Pe PsⅡ。经鉴定,Pe PsⅠ为含有吡喃的中性还原糖,而Pe PsⅡ为含有糖醛酸的吡喃酸性还原糖;两者对热稳定,不溶于有机溶剂,不含蛋白质和氨基酸;比旋光度αD20分别为+68°、+108°;分子量分别为1.49×105、1.51×105u。Pe PsⅠ主要是由L-鼠李糖、L-阿拉伯糖、D-木糖等5种单糖构成;而Pe PsⅡ主要是由L-鼠李糖、L-阿拉伯糖、D-半乳糖3种单糖构成。 

     

    Abstract: The refined polysaccharide fractions were conducted from Phyllanthus emblica L., then characterized their physiochemical and structural properties. The P. emblica polysaccharide was extracted with hot water, purified sequentially by DEAE- Sephadex A- 25 column chromatography then obtained two different polysaccharides. With analyzed for physical and chemical properties by chemical analysis, such as sulphuric acid-phenol, sulphuric acid-carbazole, I-KI. Homogeneity and relative molecular weights (Mw) tested by high performance liquid chromatography (HPLC) and monosaccharide composition which was determined by gas chromatography. Structural characterizations were carried out by ultraviolet spectroscopy and infrared spectroscopy (FT-IR) . The result showed that the fractional purification included Pe Ps Ⅰand Pe PsⅡ. Pe PsⅠ was neutral sugar with pyran, then Pe Ps Ⅱ was pyran acidic polysaccharide containing uronic acid. Both of them were heat-stable, insoluble in organic solvents and free of proteins and amino acids. The specific rotation of Pe Ps Ⅰ and Pe Ps Ⅱ were +68° and +108°, relative molecular mass were 1.49 ×105u and 1.51 ×105u, respectively. Pe Ps Ⅰ were constituted mainly by five monosaccharide residues, including L- rhamnose, L- arabinose, D- xylose, then Pe Ps Ⅱ were constituted mainly by three monosaccharide residues, such as L-rhamnose, L-arabinose, D-galactose.

     

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