食品科学 ›› 2009, Vol. 30 ›› Issue (16): 73-77.doi: 10.7506/spkx1002-6630-200916010

• 工艺技术 • 上一篇    下一篇

南瓜水溶性多糖的制备及硫酸酯化初步研究

孔 倩,周 婷,武改兰,黄景荣,李全宏*   

  1. 中国农业大学食品科学与营养工程学院
  • 收稿日期:2008-08-27 修回日期:2009-06-16 出版日期:2009-08-15 发布日期:2010-12-29
  • 通讯作者: 李全宏 E-mail:liquanhong66@163.com

Preparation and Sulfation of Polysaccharides from Pumpkin

KONG Qian,ZHOU Ting,WU Gai-lan,HUANG Jing-rong,LI Quan-hong*   

  1. College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
  • Received:2008-08-27 Revised:2009-06-16 Online:2009-08-15 Published:2010-12-29
  • Contact: LI Quan-hong E-mail:liquanhong66@163.com

摘要:

采用水提分级醇沉法提取南瓜多糖并进行硫酸酯化修饰初步研究。通过DEAE-Sepharose Fast Flow 离子交换层析分离纯化得到南瓜多糖PL-2。 Sepharose CL-6B 凝胶过滤层析和高效液相色谱鉴定PL-2 纯度,证明其组分均一,且分子量> 2000kD。采用氯磺酸- 吡啶法、三氧化硫- 吡啶法、氨基磺酸法对南瓜多糖PL-2 进行硫酸酯化修饰,BaCl2- 明胶比浊法和红外光谱鉴定取代效果,结果表明,三氧化硫- 吡啶法的修饰效果相对较好。

关键词: 南瓜多糖, 纯化, 硫酸酯化

Abstract:

Crude water-soluble polysaccharides were separated from pumpkin by hot water extraction and gradient ethanol precipitation, and purified/fractionated by DEAE-Sepharose Fast Flow anion-exchange chromatography and a acidic polysaccharide PL-2 was obtained. Sepharose CL-6B gel filtration chromatography and HPLC analysis demonstrated that the component of PL-2 was homogenous and its molecular weight was more than 2000 kD. The polysaccharide was chemically modified by chlorosulfuric acid-pyridine method, sulfur trioxide-pyridine method and sulfamic acid, respectively. The identification of BaCl2-gelatin turbidimetry and infrared spectra revealed that sulfur trioxide-pyridine method displayed the best sulfation effect.

Key words: pumpkin polysaccharide, purification, sulfation

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