食品科学 ›› 2012, Vol. 33 ›› Issue (6): 215-219.doi: 10.7506/spkx1002-6630-201206046

• 分析检测 • 上一篇    下一篇

气相色谱柱前衍生化测定竹叶多糖超临界CO2 提取物

任美玲1,吕兆林2,*,欧阳呓林1,林 西1,张柏林1   

  1. 1.北京林业大学生物科学与技术学院 2.北京林业大学分析测试中心
  • 出版日期:2012-03-25 发布日期:2012-03-03
  • 基金资助:
    “十一五”国家科技支撑计划项目(2006BAD19B08);国家林业公益性行业科研专项(200904014)

Supercritical CO2 Fluid Extraction and Pre-column Derivatization GC Analysis of Polysaccharides Bamboo Leaf Polysaccharides in a Static-dynamic Mode

REN Mei-ling1, Lv Zhao-lin2,*,OUYANG Yi-lin1,LIN Xi1,ZHANG Bo-lin1   

  1. (1. College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China; 2. Analysis Center, Beijing Forestry University, Beijing 100083, China)
  • Online:2012-03-25 Published:2012-03-03

摘要: 对毛竹(Phyllostachys heterocycla)、苦竹(Pleioblastus amarus)、绿竹(Dendrocalamopsis oldhami)及黄甜竹(Acidosasa edulis)4个种的竹子竹叶多糖进行研究。采用超临界CO2流体高效萃取竹叶多糖,以体积分数为75%的乙醇溶液为夹带剂,萃取釜温度50℃,萃取压力40MPa,夹带剂用量与竹叶的质量的比为3:1(mL/g),采用静态萃取与动态萃取兼顾的提取方式,萃取时间各1h,其中,绿竹叶(均以干叶计算)中多糖含量最高(16.585mg/g),其次是黄甜竹(12.804mg/g)、毛竹(8.255mg/g)、苦竹(6.329mg/g)。并对4个种的竹叶多糖经三氟乙酸水解、乙酰化和气相色谱分析,研究其单糖的物化特征,结果表明,4个种的竹叶多糖中均含甘露糖、鼠李糖、半乳糖、葡萄糖、阿拉伯糖、木糖和岩藻糖,毛竹、绿竹、苦竹叶中葡萄糖含量较高,黄甜竹叶中半乳糖较高,绿竹叶中的葡萄糖含量可达2.345mg/g,半乳糖含量可达1.432mg/g,这两种单糖的含量在4个种的竹叶中最高。

关键词: 超临界CO2流体萃取, 竹叶多糖, 气相色谱, 柱前衍生化, 单糖特征

Abstract: Static-dynamic supercritical CO2 fluid extraction was carried out at 50 ℃ and 40 MPa for 1 h in each mode using 75% ethanol as the entrainer for extracting Bamboo polysaccharides from the leaves of Phyllostachys heterocycla, Pleioblastus amarus, Dendrocalamopsis oldhami, and Acidosasa edulis at an entrainer-to-material ratio of 3:1 (mL/g). The polysaccharide contents of the leaves of Phyllostachys heterocycla, Pleioblastus amarus, Dendrocalamopsis oldhami, and Acidosasa edulis, as calculated based on a dry matter basis, were 16.585, 12.804, 8.255 mg/g and 6.329 mg/g, respectively. The polysaccharide samples obtained were hydrolyzed with trifluoroacetic (TFA), acetylated and analyzed for monosaccharide composition by gas chromatography. Each polysaccharide contained mannose, rhamnose, galactose, glucose, arabinose, xylose and fucose. The predominant saccharide was glucose in D. oldhami, P.amarus and P. heterocycla and galactose in A. edulism. D. oldhami leaves contained 2.345 mg/g glucose and 1.432 mg/g and galactose, both of which were the most predominant monosaccharides in the four species of bamboo leaves.

Key words: supercritical fluid extraction, bamboo polysaccharides, gas chromatography, pre-column derivatization, monosaccharide composition

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