Author(s)

Susanne Baldermann, Ziyin Yang, Tsuyoshi Katsuno, Vo Anh Tu, Nobuyuki Mase, Yoriyuki Nakamura, Naoharu Watanabe

Faculty of Agriculture, Shizuoka University, Shizuoka, Japan.
Graduate School of Engineering, Shizuoka University, Hamamatsu, Japan.
Leibniz-Institute of Vegetables and Ornamental Crops Gro?beeren/Erfurt e.V, Gro?beeren, Germany.
Shizuoka Prefectural Research Institute of Agriculture and Forestry Tea Research Center, Shizuoka, Japan.
South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.

Tea is one of the most consumed beverages in the world and its quality is influenced by geographical origin and production methods. This study focuses on the volatile aroma components of 38 tea products from China, Japan, Indonesia, Sri-Lanka, and Chinese Taipei; among them 7 green teas, 13 oolong teas, and 18 black teas. The volatiles were extracted from the infusions using PorapakQ-resin, concentrated, and analyzed by gas chromatography-mass spectrometry. The components were identified by authentic reference compounds or preliminary based on their mass spectra. Different manufacturing processes yield different blends of aroma compounds. In general, the contents of total volatiles, aliphatics, aromatics, and terpenoids increased with the fermentation degree, whereas jasmine lactone and indole were the highest in oolong teas. Some particular manufacturing processes, for example, the use of tea leaves infested by the tea green leafhopper, lead to higher contents of volatiles in final products as in Oriental Beauty oolong tea. The relative peak areas determined for 82 volatiles were the basis for the statistical analysis and highlight the potential of multivariate analysis to distinguish tea samples of different categories.

Aroma, Camellia sinensis, Fermentation, Clustering Analysis, Tea

Baldermann, S. , Yang, Z. , Katsuno, T. , Tu, V. , Mase, N. , Nakamura, Y. and Watanabe, N. (2014) Discrimination of Green, Oolong, and Black Teas by GC-MS Analysis of Characteristic Volatile Flavor Compounds. American Journal of Analytical Chemistry, 5, 620-632. doi: 10.4236/ajac.2014.59070.