Identification and characterization of key aroma compounds in Chinese high altitude and northernmost black tea (Camellia sinensis) using distillation extraction and sensory analysis methods was written by Chen, Xiaohua;Sun, Haiyan;Qu, Dong;Yan, Fei;Jin, Wengang;Jiang, Hai;Chen, Chen;Zhang, Yifan;Li, Chongyong;Xu, Zhimin. And the article was included in Flavour and Fragrance Journal in 2020.COA of Formula: C8H16O2 The following contents are mentioned in the article:
The studied Chinese northernmost black tea made of the tea leaves harvested at high altitude and low climatic temperature location and special tea manufacturing process presented strong honey-like, moderated green/grass and weak floral and fruity aromas. Its aroma was significantly different from other black tea. The key compounds responsible for these aromas were identified and quantified by gas chromatog.-mass spectrometry (GC-MS), gas chromatog.-olfactometry (GC-O), aroma extract dilution anal. (AEDA), aroma reconstitution and exclusion experiments methods. A total of fifty-eight aroma compounds were found in the black tea. Among them, phenylacetaldehyde, E-2-hexenal, E,E-2,4-nonadienal, 2-methylbutanoic acid Et ester, β-ionone, linalool, α-ionone and geraniol were mainly responsible for the black tea aroma. They offered honey-like, floral, green/grassy, violet-like and fruity aromas in the tea infusion. Although E,Z-2,6-nonadienal was one of the major volatile compounds, its unique cucumber-like odor was not perceived in the tea fusion. The special growing location and processing for the tea leaves may contribute to the unique aroma of the black tea. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0COA of Formula: C8H16O2).
Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.COA of Formula: C8H16O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics