文献类型： 外文期刊
作者： Liu, Panpan 1 ; Zheng, Pengcheng 3 ; Feng, Lin 3 ; Gong, Ziming 3 ; Zheng, Lin 3 ; Gao, Shiwei 3 ; Wang, Xueping 3 ; Ye, Fei 3 ; Huang, Jianan 1 ; Liu, Zhonghua 1 ;
作者机构： 1.Hunan Agr Univ, Key Lab Tea Sci, Natl Res Ctr Engn & Technol Utilizat Bot Funct In, Minist Educ, Changsha 410128, Hunan, Peoples R China
2.Hunan Agr Univ, Coinnovat Ctr, Minist Utilizat Bot Funct Ingredients, Changsha 410128, Hunan, Peoples R China
3.Hubei Acad Agr Sci, Hubei Qingzhuan Tea Engn Res Ctr, Fruit & Tea Res Inst, Wuhan 430064, Hubei, Peoples R China
关键词： Qingzhuan tea; Pile fermentation; Volatile component; Gas chromatography -olfactometry; Odor-activity value
期刊名称：FOOD CHEMISTRY （ 影响因子：9.231； 五年影响因子：8.795 ）
ISSN： 0308-8146
年卷期： 2022 年 375 卷
页码：
收录情况： SCI
摘要： Changes in key odorants and aroma profiles of Qingzhuan tea (QZT) during its manufacture were determined using headspace solid-phase microextraction gas chromatography-mass spectrometry/olfactometry. An aroma profile was constructed to illustrate sensory changes during manufacture. The characteristic aroma of QZT was aged fragrance, which was mostly developed during pile fermentation and was enhanced during the aging and drying stages. Using volatile compounds found in the raw materials, sun-dried green tea and QZT finished product were compared by orthogonal partial least square-discriminant analysis. Among 108 detected volatiles, 19 were significantly upregulated and 15 were downregulated. (E)-beta-Ionone, (E,Z)-2,6-nonadienal, 1-octen-3one, (E,E)-2,4-heptadienal, (E,E)-2,4-nonadienal, safranal, (E)-2-nonenal, alpha-ionone, and 1,2,3-trimethoxybenzene were found to be significant contributors to the aged QZT fragrance, reflecting their high odor-activity values and aroma intensities. Finally, the metabolic transformation of key aroma-active compounds was systematically analyzed. This study provided a theoretical basis for improving the processing and quality of QZT.
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