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Journal of Tea Science ›› 2018, Vol. 38 ›› Issue (4): 406-409.doi: 10.13305/j.cnki.jts.2018.04.008

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Discrimination of Fermenting Degree of Congou Black Tea Based on Monoterpenoid

HE Huafeng1, GUI Anhui2, YE Yang1,*   

  1. 1. Tea Research Institute, CAAS, Hangzhou 310008, China;
    2. Institute of Fruit & Tea, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
  • Received:2017-12-18 Revised:2018-01-04 Online:2018-08-15 Published:2019-10-15

Abstract: As the basic constituents, monoterpenoids are important indicators for the tea aromatic quality. The time course changes of aromatic components were tracking analyzed throughout the fermentation process. Based on organoleptic evaluation, degree of fermentation was classified qualitatively. Using gas chromatography-mass spectrometry (GC-MS), compositions of aroma were screened during fermentation, and 21 monoterpenoids were discriminated by taking chemical structure into consideration. Employing partial least squares discrimination analysis (PLS-DA) to analyze, effective prejudgment of the fermenting degrees was obtained. Five compounds of the monoterpenoids were calculated as the crucial compositions in connection with the prognosis. Result of the research would be the theoretic guarantee for the feedback control of fermentation process of Congou black tea.

Key words: monoterpenoid, fermentation, discrimination, moderation, Congou black tea

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