食品科学

• 基础研究 • 上一篇    下一篇

茶叶籽油生产中的反式脂肪酸变化

陈德经1,曹寒梅2,秦公伟2   

  1. 1.陕西理工学院 陕西省资源生物重点实验室,陕西 汉中 723001;
    2.陕西理工学院生物科学与工程学院,陕西 汉中 723001
  • 发布日期:2013-09-27
  • 通讯作者: 陈德经
  • 基金资助:

    陕西省自然科学基金项目(2011JM3008);陕西省教育厅重点实验室项目(11JS032)

Changes of Trans Fatty Acids in Production of Tea Seed Oil

CHEN De-jing1,CAO Han-mei2,QIN Gong-wei2   

  1. 1. Shaanxi Provincial Bio-resource Key Laboratory, Shaanxi University of Technology, Hanzhong 723001, China;
    2. School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China
  • Published:2013-09-27
  • Contact: CHEN De-jing

摘要:

研究茶叶籽油生产中反式脂肪酸产生与变化的原因。对茶叶籽冷榨毛油、脱胶、脱酸和脱色,以及对在150、200、250、270℃经1、2、3、4h的脱臭脱水油脂,用氢氧化钾-甲醇溶液甲酯化,以37种脂肪酸标准品为对照,采用气相色谱法测定茶叶籽油中反式脂肪酸的组成及含量的变化。结果表明:冷榨毛油、脱胶、脱酸、脱色油脂均不含反式脂肪酸,茶叶籽油脱臭、脱水温度高于250℃,容易产生反式脂肪酸,而低于150℃、时间小于3h,不会产生反式脂肪酸。

关键词: 茶叶籽油, 加工, 反式脂肪酸, 气相色谱

Abstract:

This study aimed to investigate the cause of generation and transformation of trans fatty acids in tea seed
oil production. Crude tea seed oil was prepared by cold press technology followed by degumming, deacidification and
bleaching. The oil sample was further subjected to esterification using potassium hydroxide-methanol solution methyl before
deodorization and dehydration. The changes of fatty acid composition and the content of trans fatty acids in the final oil
products were determined by gas chromatography in comparison with 37 kinds of fatty acids standards. The results showed
that no trans fatty acids were detected in cold pressed crude oil, deacidificated or decolored oil. High temperatures (≥ 250 ℃)
could result in the generation of trans fatty acids while they were undetectable in the oil samples deodorized and dehydrated
at low temperature (≤ 150 ℃) for less than 3 hours.

Key words: tea seed oil, processing, trans fatty acids, gas chromatography (GC)

中图分类号: