Identification of Key Taste-Active Compounds in Oolong Teas (Dongding and Rougui) by Quantitative Measurements,...

Area of Science:

• Food Chemistry
• Sensory Science
• Agricultural Science

Background:

• Oolong tea quality is hindered by limited understanding of its taste-active compounds.
• Identifying these compounds is crucial for targeted product improvement and flavor enhancement.

Purpose of the Study:

• To identify and quantify key taste-active compounds in Oolong tea.
• To establish a scientific basis for improving Oolong tea's sensory characteristics.

Main Methods:

• Nontargeted metabolomics and sensory quantitative descriptive analysis were employed.
• Taste dose-over-threshold (DoT) and omission experiments were conducted to validate compound importance.

Main Results:

• 41 compounds were screened for taste relevance; ten were selected for reconstitution.
• Epigallocatechin gallate, caffeine, and various flavonoids were identified as key contributors to Rougui and Dongding tea taste.

Conclusions:

• Specific compounds like epigallocatechin gallate and caffeine significantly influence Oolong tea flavor.
• This research provides actionable insights for enhancing Oolong tea taste profiles.