食品科学 ›› 2017, Vol. 38 ›› Issue (6): 185-190.doi: 10.7506/spkx1002-6630-201706029

• 成分分析 • 上一篇    下一篇

生姜皮多糖的分离纯化及其结构组成分析

冯 鑫,夏 宇,陈贵堂,胥佳佳,廖小军,赵立艳   

  1. 1.南京农业大学食品科技学院,江苏 南京 210095;2.中国药科大学工学院,江苏 南京 210009;3.中国农业大学食品科学与营养工程学院,北京 100083
  • 出版日期:2017-03-25 发布日期:2017-03-28
  • 基金资助:
    公益性行业(农业)科研专项(201303079)

Purification and Structural Analysis of Polysaccharides from Ginger Peels

FENG Xin, XIA Yu, CHEN Guitang, XU Jiajia, LIAO Xiaojun, ZHAO Liyan,   

  1. 1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; 2. College of Engineering, China Pharmaceutical University, Nanjing 210009, China; 3. College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
  • Online:2017-03-25 Published:2017-03-28

摘要: 以生姜皮为原料,经热水浸提法,乙醇醇沉得到生姜皮粗多糖。再经DEAE-纤维素-52阴离子交换柱和Sephadex G-100凝胶柱对所得粗多糖进行层析纯化,得到3 种水溶性生姜皮多糖(GE-1、GE-2、GE-3)。利用高效液相色谱与蒸发光散射检测器联用测定各多糖组分的分子质量,利用柱前衍生高效液相色谱法分析各多糖组分的单糖组成,通过紫外光谱扫描、红外光谱扫描进一步分析各组分多糖结构。结果表明3 种纯化多糖组分总糖含量分别为(98.06±0.15)%、(97.41±0.42)%、(97.89±0.22)%,分子质量分别为462、194 kD和376 kD。GE-1的单糖组成主要为甘露糖、葡萄糖、木糖,含有微量的半乳糖,其物质的量比为1.25∶6∶1;GE-2的单糖组成主要为甘露糖、葡萄糖和岩藻糖,其物质的量比为2.51∶9.25∶1;GE-3的单糖组成主要为甘露糖、核糖、半乳糖、阿拉伯糖,其物质的量比为17.39∶1∶1.89∶1.23。紫外光谱扫描结果显示3 种多糖组分无明显的核酸和蛋白质吸收峰,红外光谱结果分析得出GE-1、GE-2和GE-3含有多糖类物质的特征吸收峰。

关键词: 生姜皮多糖, 分离纯化, 分子质量, 单糖组成

Abstract: Crude polysaccharides were extracted from ginger peels by hot water extraction and alcohol precipitation. DEAEcellulose 52 and Sephadex G-100 gel filter column chromatographies were sequentially used to purify crude polysaccharides. The purified polysaccharides were designated as GE-1, GE-2 and GE-3, respectively. Their molecular weight distribution and monosaccharide compositions were analyzed by high performance liquid chromatography (HPLC). The structure of the deproteinized polysaccharides from ginger peels were analyzed and characterized by ultraviolet (UV) and infrared (IR) spectroscopy. The results showed that the total sugar contents of GE-1, GE-2 and GE-3 were (98.06 ± 0.15)%, (97.41 ± 0.42)% and (97.89 ± 0.22)%, respectively. Their molecular weights were 462, 194 and 376 kD, respectively. The structural analysis demonstrated that GE-1 was composed of mannose, glucose and xylose at a molar ratio of 1.25:6:1, GE-2 was composed of mannose, glucose and fucose at a molar ratio of 2.51:9.25:1, and GE-3 was composed of mannose, ribose, galactose and arabinose at a molar ratio of 17.39:1:1.89:1.23.

Key words: ginger peel polysaccharides, isolation and purification, molecular weight, monosaccharide composition

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