食品科学

• 基础研究 • 上一篇    下一篇

米糠脂溶性单体化合物的分离与结构鉴定

刘天行,王 伟,郭 佳,辛志宏   

  1. 1.南京农业大学食品科技学院,江苏 南京 210095;2.南京农业大学图书馆,江苏 南京 210095
  • 出版日期:2014-05-15 发布日期:2014-05-19

Isolation and Identification of Lipid-Soluble Compounds from Rice Bran

LIU Tian-xing, WANG Wei, GUO Jia, XIN Zhi-hong   

  1. 1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China;
    2. Nanjing Agricultural University Library, Nanjing 210095, China
  • Online:2014-05-15 Published:2014-05-19

摘要:

以米糠为原料,采用有机溶剂提取得到粗提物,利用硅胶柱层析和Sephadex LH-20凝胶柱层析等分离方法从米糠粗提物中分离得到9 个单体化合物,通过核磁共振(nuclear magnetic resonance,NMR)和电喷雾质谱(electrospray ionization mass spectrometry,ESI-MS)鉴定其化学结构分别为油酸、亚油酸、2,3-二羟基硬脂酸丙酯、2,3-二羟基油酸丙酯、3-羟基1,2-二油酸丙二酯、1,3-二油酸丙二酯、1,3-二油酸-2-硬脂酸甘油酯、豆甾醇、麦角甾醇。

关键词: 米糠, 脂溶性化合物, 分离纯化, 结构鉴定

Abstract:

Crude extract was obtained by the extraction of rice bran using organic solvent. Nine pure compounds
were isolated and identified from the extract using silica gel column chromatography and Sephadex LH-20 column
chromatography. Their chemical structures were elucidated as oleic acid, linoleic acid, 2,3-dihydroxypropyl stearate,
2,3-dihydroxypropyl oleate, 3-hydroxy-1,2-propyl diolein,1,3-diolein, 1,3-2-oleyl,2-stearoyl triacylglycerol, stigmasterol,
and ergosterol by nuclear magnetic resonance (NMR) and electro-spray ionization mass spectrometry (ESI-MS).

Key words: rice bran, fat-soluble compounds, isolation and purification, structural identification