Composition Profile
Verified · 2026-09-25- 01Tea polyphenols11.6–15.63 %Dry-leaf sample
- 02Caffeine2.28–3.45 %Dry-leaf sample
- 03Key volatile profileTea samples made from Qimen Zhong, Fuzao 2 and Wancha 4 contained 102, 75 and 88 aroma compounds respectively. Geraniol, trans-β-ionone, phenylacetaldehyde, linalool, hexanal and phenethyl alcohol were major contributors to the aroma of Qimen Zhong.Dry-leaf sample
Six key aroma-active compounds jointly contribute to the core aromatic expression of Qimen Zhong.
Current evidence shows that tea polyphenols, caffeine and amino acids vary with Qimen grade, while aroma profiles are strongly affected by tea cultivar and processing stage. These studies are best used to build research-sample profiles rather than compressed into fixed composition constants.

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