食品科学

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湖南茯砖茶香气成分的SPME-GC-TOF-MS分析

颜鸿飞1,2,王美玲1,2,白秀芝2,朱绍华1,2,戴 华1,李拥军1,2,*   

  1. 1.湖南出入境检验检疫局,湖南 长沙 410004;2.国家食品安全检测重点实验室,湖南 长沙 410004
  • 出版日期:2014-11-25 发布日期:2014-12-09
  • 基金资助:

    国家质检总局科技计划项目(2012IK160)

Analysis of Aroma Composition in Hunan Fuzhuan Tea by Solid-Phase Microextraction Combined with Gas Chromatography-Time of Flight-Mass Spectrometry

YAN Hong-fei1,2, WANG Mei-ling1,2, BAI Xiu-zhi2, ZHU Shao-hua1,2, DAI Hua1, LI Yong-jun1,2,*   

  1. 1. Hunan Entry-Exit Inspection and Quarantine Bureau, Changsha 410004, China;
    2. National Key Testing Laboratory of Food Safety, Changsha 410004, China
  • Online:2014-11-25 Published:2014-12-09

摘要:

采用单因素对比试验方法确定固相微萃取湖南茯砖茶中香气成分的优化条件,并结合气相色谱-飞行时间-质谱法鉴定湖南茯砖茶香气组分。结果表明:固相微萃取与气相色谱-飞行时间-质谱联用分析湖南茯砖茶香气成分的最佳条件为DVB/CAR/PDMS萃取头(50/30 μm)、萃取温度80 ℃和萃取时间60 min。气相色谱-飞行时间-质谱法从3 个茯砖茶中共分离鉴定出93 种香气成分,占检出挥发性成分总量的90%以上,主要由酮类、醛类、碳氢类、杂氧类、醇类、酸类、酯类、含氮类8 类化合物构成。在鉴定出的香气化合物中共有香气组分50 个,其中含量较高的组分有反,反-2,4-庚二烯醛、甲基庚烯酮、2-戊基呋喃、香叶基丙酮、3,5-辛二烯-2-酮(E,E)、6-甲基-3,5-庚二烯-2-酮等。

关键词: 固相微萃取, 气相色谱-飞行时间-质谱法, 湖南茯砖茶, 香气成分

Abstract:

The aroma components of Hunan Fuzhuan tea were extracted by space solid phase microextraction (SPME)
technique and determined by gas chromatography-time of flight-mass spectrometry (GC-TOF-MS). The optimum extraction
conditions were determined as follows: DVB/CAR/PDMS extraction head (30/50 μm), extraction temperature 80 ℃, and
extraction time 60 min. A total of 93 aroma components of Hunan Fuzhuan tea accounting for over 90% of the total volatile
components were identified, including ketones, aldehydes, hydrocarbon, heterocyclicoxygen compounds, alcohols, acids,
esters, and nitrogen-containing compounds. There were 50 same aroma components identified in three kinds of Fuzhuan teas,
where the major volatile components were E,E-2,4-heptadienal, 6-methyl-5-hepten-2-one, 2-pentyl-furan, geranyl acetone,
3,5-octadiene-2-one (E,E), 6-methyl-3,5-heptadien-2-one, and so on.

Key words: solid phase microextraction (SPME), gas chromatography-time of flight-mass spectrometry (GC-TOF-MS), Hunan Fuzhuan tea, aroma composition

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