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Poster Presentations
Day 2, June 23（Mon.）
Room P (Maesato East, Foyer, Ocean Wing)
- 2P-PM-10
Volatilomic Analysis on Authenticity Verification and Quality Assessment of Taiwan Oriental Beauty Oolong Tea
(1IMB, NCHU, Taiwan, 2NCYU, Taiwan, 3Tea and Beverage Research Station, MOA, Taiwan)
oWei-Chen Wang1, Cheng-Yu Kuo1, Yi-Feng Cheng1, Yen-Ching Lin1, Han-Ju Chien2, Chih-Chun Kuo3, Hsuan-Han Huang3, Hsien-Tsung Tsai3, Tsung-Chen Su3, Chien-Chen Lai1
Taiwan Oriental Beauty oolong tea is a highly prized and limited-production tea, and its authenticity and quality control are therefore crucial for both consumers and producers. The project established a reliable analytical platform for inspecting the volatile compounds (VCs) that contribute to the unique aroma of Oriental Beauty tea. Gas chromatography-mass spectrometry (GC-MS) is employed for VCs' identification and quantification, while headspace solid-phase microextraction (HS-SPME) is coupled to efficiently extract VCs without sample destruction. Through multivariate statistical analysis, 38 key VCs were visualized and ranked by variable importance in the projection (VIP) score. These compounds effectively distinguish authentic Oriental Beauty teas produced either domestic or foreign. It's interesting to also note that 9 of the former VCs were consistently present in a tea grade sensory evaluation of the national Oriental Beauty tea competition (62 teas in total). These volatiles were positively correlated with the sensory of floral, fruity, and honey, indicating their use as tea quality markers. In brief, our research successfully put the analytical framework into practice for enhancing traceability and authenticity verification of tea and also provided valuable insights for tea quality assessment and classification.