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Abstract:
Wuyi rock tea is a typical Oolong tea variety, which is characterized with 'rock in the throat, flower in the mouth'. Moreover, the aroma of Wuyi rock tea can last for a long time during brewing. In this study, the volatile aroma components of Wuyi rock tea and their releasing pattern under continual 15 times of boiling water infusing were investigated by using headspace solid phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry(GC-MS). A total of 108 kinds of volatile components were identified, including alcohols, aldehydes, ketones, esters, pyrazine, acids, phenol, aniline, other benzene compounds, hydrocarbons, furan and pyrrole. PCA analysis indicated that the volatile aroma components profiles in the first three infusions were similar; the fourth to seventh infusions have a similar aromatic profile; while the eighth to fifteenth infusions have a similar aromatic profile. With the increase of the infusing time, the total content of volatile aroma components decreased gradually. The eighth to fifteenth infusions still retained 27 volatile aroma components and 17.04% of total aroma contents. The main retained components included nerolidol (0.739 μL/L), hexanal (0.349 μL/L), nonanal (0.181 μL/L), decyl aldehyde (0.127 μL/L), methyl heptenone (0.069 μL/L) and beta ionone(0.426 μL/L). The persistence of the aroma of Wuyi rock tea during infusing may partly because of the relatively slow releasing rate of these components. This study provides new theoretical basis for the Fujian north Oolong tea processing technology and quality identification. © 2018, Editorial Office of Journal of CIFST. All right reserved.
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Journal of Chinese Institute of Food Science and Technology
ISSN: 1009-7848
Year: 2018
Issue: 12
Volume: 18
Page: 309-318
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count: 3
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
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