Headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS-SPME-GC-MS) and odor activity value (OAV) to reveal the flavor characteristics of ripened Pu-erh tea by co-fermentation
文献类型： 外文期刊
作者： Zheng, Yaru 1 ; Zhang, Chunhua 2 ; Ren, Dabing 1 ; Bai, Ruoxue 1 ; Li, Wenting 1 ; Wang, Jintao 1 ; Shan, Zhiguo 2 ; Dong, Wenjiang 3 ; Yi, Lunzhao 1 ;
作者机构： 1.Kunming Univ Sci & Technol, Fac Food Sci & Engn, Kunming, Yunnan, Peoples R China
2.Puer Univ, Coll Agr & Forestry, Puer, Yunnan, Peoples R China
3.Chinese Acad Trop Agr Sci, Spice & Beverage Res Inst, Wanning, Peoples R China
关键词： ripened Pu-erh tea; flavor; mixed fermentation; HS-SPME-GC-MS; OAV
期刊名称：FRONTIERS IN NUTRITION （ 影响因子：5.0； 五年影响因子：5.7 ）
ISSN： 2296-861X
年卷期： 2023 年 10 卷
页码：
收录情况： SCI
摘要： IntroductionPu-erh tea is a geographical indication product of China. The characteristic flavor compounds produced during the fermentation of ripened Pu-erh tea have an important impact on its quality. MethodsHeadspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS-SPME-GC-MS) and odor activity value (OAV) is used for flavor analysis. ResultsA total of 135 volatile compounds were annotated, of which the highest content was alcohols (54.26%), followed by esters (16.73%), and methoxybenzenes (12.69%). Alcohols in ripened Pu-erh tea mainly contribute flower and fruit sweet flavors, while methoxybenzenes mainly contribute musty and stale flavors. The ripened Pu-erh tea fermented by Saccharomyces: Rhizopus: Aspergillus niger mixed in the ratio of 1:1:1 presented the remarkable flavor characteristics of flower and fruit sweet flavor, and having better coordination with musty and stale flavor. DiscussionThis study demonstrated the content changes of ripened Pu-erh tea's flavor compounds in the fermentation process, and revealed the optimal fermentation time. This will be helpful to further understand the formation mechanism of the characteristic flavor of ripened Pu-erh tea and guide the optimization of the fermentation process of ripened Pu-erh tea.
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