食品科学

• 基础研究 • 上一篇    下一篇

不同提取方法对柑橘皮果胶组分和抗氧化性的影响

田长城1,2,许 晖2,孟海涛1   

  1. 1.合肥工业大学生物与食品工程学院,安徽 合肥 230009; 2.蚌埠学院生物与食品工程系,安徽 蚌埠 233030
  • 出版日期:2013-07-15 发布日期:2013-06-28
  • 通讯作者: 田长城
  • 基金资助:

    食品科学与工程省级教学团队项目(20101094);蚌埠学院自然科学一般项目(2010ZR09)

Effect of Extraction Methods on Determination of Pectin Composition and Antioxidant Activity of Citrus Peel

TIAN Chang-cheng1,2,XU Hui2,MENG Hai-tao1   

  1. 1. School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China;
    2. Department of Biology and Food Engineering, Bengbu College, Bengbu 233030, China
  • Online:2013-07-15 Published:2013-06-28
  • Contact: TIAN Chang-cheng

摘要:

以柑橘皮为原料,分析盐酸法和草酸铵法提取果胶的组分、单糖组成和红外波谱特征,同时比较两种方 法提取果胶的抗氧化活性。结果表明:两种果胶均为高酯果胶;盐酸法提果胶(PEH)的相对分子质量小于草酸铵提 果胶(PEO),其中含有较多的鼠李糖(5.4%)和微量的甘露糖;草酸铵提果胶则含有较多的甘露糖(5.3%)和阿拉伯糖 (24.4%);红外波谱中1102、1018、1745cm-1处的吸收峰表明两种果胶都存在糖醛酸和甲氧基基团。抗氧化性研究表 明,盐酸提果胶和草酸铵提果胶都可以有效地清除超氧阴离子自由基,清除率分别达77.0%和68.0%;此外,两种 果胶对DPPH自由基和羟自由基也具有一定的清除能力。

关键词: 盐酸法, 草酸铵法, 果胶, 单糖组成, 抗氧化性

Abstract:

Two pectin extracts from citrus peel were obtained with hydrochloric acid and ammonium oxalate, and then
their pectin composition, monosaccharide composition and infrared spectral characteristics were analyzed. Moreover, the
antioxidant activities of the two extracts were compared. The results indicated high DE (degree of esterification) in both
extracts. The pectin prepared with hydrochloric acid (PEH) contained more rhamnose (5.4%, molar ratio) and a trace of
mannose, and demonstrated a lower relative molecular mass than the pectin obtained with ammonium oxalate (PEA).
However, PEA contained more mannose (5.3%, molar ratio) and arabinose (24.4%, molar ratio). Both pectins displayed
absorption peaks at 1102, 1018 cm-1 and 1745 cm-1 indicating the existence of uronic acid and CH3O- groups. They were
effective at scavenging superoxide anion radical with scavenging rate of 77.0% and 68.0%, resepctively. In addition, DPPH
radical and hydroxide radicals could be scavenged by both.

Key words: hydrochloric acid, ammonium oxalate, pectin, monosaccharide composition, antioxidant activity

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