食品科学 ›› 2013, Vol. 34 ›› Issue (6): 227-230.doi: 10.7506/spkx1002-6630-201306051

• 分析检测 • 上一篇    下一篇

固相微萃取结合气相色谱-质谱联用法分析冷冻草莓汁异味成分

潘见,周典飞*,王颖,王莉,王硕,张岚   

  1. 合肥工业大学 农产品生物化工教育部工程研究中心,安徽 合肥 230009
  • 收稿日期:2012-01-18 修回日期:2013-01-31 出版日期:2013-03-25 发布日期:2013-03-01
  • 通讯作者: 周典飞 E-mail:zdf6919@163.com

Identification of Off-Flavor Components in Frozen Strawberry Juice

PAN Jian,ZHOU Dian-fei*,WANG Ying,WANG Li,WANG Shuo,ZHANG Lan   

  1. Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei 230009, China
  • Received:2012-01-18 Revised:2013-01-31 Online:2013-03-25 Published:2013-03-01

摘要: 为了解超高压处理的草莓汁在冷冻贮藏过程中产生的异味物质的主要成分,400MPa压力处理15min的草莓汁分别置于-60、-18、-5℃条件贮藏4周时间,采用不同涂层的固相微萃取纤维头和气质联用法分析、鉴定草莓汁冷冻贮藏后香气成分,找出异味的主要成分。结果表明:草莓汁经冻藏后香气成分发生了变化,产生不悦的异味;通过对比新鲜草莓汁,发现草莓汁在冻藏后产生了硫化氢和异辛醇,该两种物质是草莓汁冻结异味的主要原因。

关键词: 固相微萃取, 气相-质谱联用法, 草莓汁, 异味

Abstract: In order to evaluate the major off-flavor components in frozen strawberry juice after ultra-high pressure (UHP) treatment, strawberry juice was subjected to UHP treatment at 400 MPa for 15 min, and then stored at -60, -18 ℃ and -5 ℃ for 4 weeks, respectively. Solid phase micro-extraction (SPME) with different fiber coatings and gas chromatographymass spectrometry (GC-MS) were used to analyze and identify the major off-flavor components. The results showed that volatile flavor components of strawberry juice after frozen storage revealed an obvious change and unpleasant off-flavor was observed. Compared with unfrozen strawberry juice, hydrogen sulfide and isooctyl alcohol were detected in frozen strawberry juice as the major off-flavor sources.

Key words: solid phase micro-extraction (SPME), gas chromatography-mass spectrometry (GC-MS), strawberry juice, off-flavor

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