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3种清香型铁观音挥发性成分及香味特征
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  • 分类:S571.1[农业科学—茶叶生产加工;农业科学—作物学]
  • 作者机构:[1]集美大学食品与生物工程学院,福建厦门361021, [2]福建省高校食品微生物与酶工程技术研究中心,福建厦门361021, [3]厦门市食品与生物工程技术研究中心,福建厦门361021, [4]美国克莱姆森大学食品科学、营养与包装科学系,美国南卡罗琳娜州29634
  • 相关基金:福建省科技厅科技计划项目(2016N0021); 集美大学科研创新团队基金资助项目(2010A006)
中文摘要:

运用顶空固相微萃取技术结合气相色谱质谱联用仪(HS-SPME-GC-MS)和感官评价分析清香型铁观音的挥发性成分和主要风味特征。通过GC-MS检测分析,在3种清香型铁观音中共发现34种挥发性成分,主要成分均为反式-橙花叔醇、吲哚、正己醛、α-法呢烯,质量含量分别为24751~41899、19958~33929、1875~3467、1033~3361μg/kg;感官评价结果显示,3种铁观音均具有典型的清香味和花香味;香气值(OAVs)分析表明,3种铁观音中主要风味成分相同,均为癸醛(128.92~299.37)、反式-橙花叔醇(110.01~186.21)、苯乙醛(31.27~37.89)、正己醛(17.86~33.02)和吲哚(9.50~16.16);聚类分析结合感官评价表明,清香味主要来源于正己醛、苯乙醛和癸醛,花香味主要来源于反式-橙花叔醇。该研究结果说明,3种清香型铁观音的主要挥发性成分和香味特征相似,但和其他乌龙茶具有一定的差异。

英文摘要:

Three common fresh scent-flavor Tieguanyin teas were analyzed by sensory evaluation and gas chromatography-mass spectrometer( GC- MS). GC- MS analysis showed that 34 kinds of volatile organic compounds were identified in the three Tieguanyin teas,which all possessed a similar major volatile constituent,i. e.,nerolidol trans-( 24751 ~ 41899 μg/kg),indole( 19958 ~ 33929 μg/kg),hexanal( 1875 ~3467 μg/kg) and α-farnesene( 1033 ~ 3361 μg/kg). The three teas samples possessed a typical fresh and floral aroma through sensory evaluation. Besides,odour activity values showed that decanal( 128. 92 ~ 299.37),nerolidol trans-( 110. 01 ~ 186. 21),benzeneacetaldehyde( 31. 27 ~ 37. 89),hexanal( 17. 86 ~33. 02) and indole( 9. 50 ~ 16. 16) were the main flavor volatiles. By the combination of cluster analysis and sensory evaluation,it indicated that the fresh odour was mainly attributed to hexanal,benzeneacetaldehyde and decanal; and the floral odour was mainly came from nerolidol trans-. These results suggested that the fresh scent-flavor Tieguanyin teas had similar aromatic profile and volatile components,which was different from those of other types of oolong teas.

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