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This study aimed to compare volatile compounds among fresh and semi-fermented leaves of Zukro tea. Volatile compounds were extracted using the SDE method and analyzed by GC/MS. A total of 93 and 76 compounds were identified in fresh and semi-fermented leaves, respectively. Alcohols were the predominant chemical group, with proportions of 76.96% and 56.85% in fresh and semi-fermented leaves. The major alcohol compound in both samples was phytol, which had a higher aroma threshold and resulted from hydrolysis of chlorophyll. Terpenoid compounds were present at 29.1 and 24.9 mg/kg,in fresh and semi-fermented leaves, respectively. Terpene alcohols such as linalool and geraniol were present as major volatile compounds at concentrations of 7.8 and 14.4 mg/kg in fresh leaves of Zukro tea, respectively. The contents of these two terpene alcohols were 4.4 and 3.1 mg/kg in semi-fermented leaves. C6 compounds were present at 7.8 mg/kg in fresh leaves but decreased to 1.0 mg/kg in semi-fermented leaves. The contents of esters, ketones, hydrocarbons, and n-containing compounds all increased after semi-fermentation.

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