食品科学 ›› 2017, Vol. 38 ›› Issue (24): 165-170.doi: 10.7506/spkx1002-6630-201724026

• 工艺技术 • 上一篇    下一篇

响应面法优化南极磷虾粗脂肪索氏提取工艺

周 莉,李佩璇,赵钰灵,曾晓雄   

  1. 南京农业大学食品科技学院,江苏 南京 210095
  • 出版日期:2017-12-25 发布日期:2017-12-07
  • 基金资助:
    国家自然科学基金青年科学基金项目(NSFC31501521);江苏省自然科学基金青年基金项目(BK20140701)

Optimization of Soxhlet Extraction of Antarctic Krill Lipid by Response Surface Methodology

ZHOU Li, LI Peixuan, ZHAO Yuling, ZENG Xiaoxiong   

  1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
  • Online:2017-12-25 Published:2017-12-07

摘要: 采用索氏提取法从南极磷虾中提取粗脂肪,分别考察提取溶剂、提取温度、提取时间和提取溶剂体积比对 南极磷虾粗脂肪得率的影响。在单因素试验的基础上,采用响应面法进行工艺优化,确定最佳提取条件为提取溶剂 正己烷-无水乙醇(3.5∶1,V/V)、提取温度80 ℃、提取时间5.4 h。在此条件下,南极磷虾粗脂肪得率为12.32%。 采用气相色谱法分析南极磷虾粗脂肪的脂肪酸组成,结果表明,粗脂肪中主要含有棕榈酸(C16:0,28.86%)、EPA (C20:5n3,15.48%)、油酸(C18:1n9c,12.71%)和二十二碳六烯酸(C22:6,12.22%)。不饱和脂肪酸的相对含量高达 57.47%,其中单不饱和脂肪酸相对含量19.82%,多不饱和脂肪酸相对含量37.65%。因此,南极磷虾是多不饱和脂 肪酸的新来源,具有较高的营养价值,可作为膳食营养补充剂广泛应用。

 

关键词: 南极磷虾粗脂肪, 脂肪酸, 索氏提取法, 响应面法

Abstract: The Soxhlet extraction of lipid from Antarctic krill was optimized using one-factor-at-a-time method and
response surface methodology. The lipid yield was studied as a function of solvent type and composition, extraction
temperature and time. The results showed that optimal extraction conditions that resulted in the maximum lipid yield
of 12.32% were as follows: a mixture of hexane and ethanol (3.5:1, V/V) as extraction solvent, temperature 80 ℃, and
time 5.4 h. Gas chromatography analysis showed that the lipid obtained was mainly composed of palmitic acid (C16:0,
28.86%), eicosapentaenoic acid (C20:5n3, 15.48%), oleic acid (C18:1n9c, 12.71%) and docosahexaenoic acid (C22:6, 12.22%).
The unsaturated fatty acid content was above 57.47%, with monounsaturated fatty acids and polyunsaturated fatty acids
accounting for 19.82% and 37.65%, respectively. Therefore, Antarctic krill is a novel source of polyunsaturated fatty acids,
and has high nutritional value and could be widely used as dietary supplements.

Key words: Antarctic krill lipid, fatty acid, Soxhlet extraction, response surface methodology

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