Composition Profile
Verified · 2026-09-26- 01Key odorants of the roasty aroma in tea liquorSixty-five odor-active regions were obtained and 54 compounds quantified, of which 32 exceeded their odor thresholds. OAV values for 2-methylbutanal and γ-hexalactone reached 248 and 154 respectively.Infusion / tea liquor
Multiple pyrazines, lactones, aldehydes and phenols jointly shape roasty, caramel-like and baked aromatic impressions.
- 02Volatile profiles across gradesA total of 210 volatile compounds were analyzed across Special Grade, Grade 1 and Grade 2 samples. The grades differed in the proportions of terpenes, esters, aldehydes/ketones and pyrazine/furan compounds.Dry-leaf sample
Roasty aroma arises from the combined action of multiple aldehydes, lactones, pyrazines, phenols and related odorants, while different grades also show systematic differences in volatile composition.

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