Identification of aroma-active compounds responsible for the floral and sweet odors of Congou black teas using gas chromatography-mass spectrometry/olfactometry, odor activity value, and chemometrics was written by Xue, Jinjin;Guo, Guiyi;Liu, Panpan;Chen, Lin;Wang, Weiwei;Zhang, Jianyong;Yin, Junfeng;Ni, Dejiang;Engelhardt, Ulrich H.;Jiang, Heyuan. And the article was included in Journal of the Science of Food and Agriculture in 2022.Electric Literature of C8H16O This article mentions the following:
Floral and sweet odors are two typical characteristic aromas of Congou black tea, but their aroma-active compounds are still unclear. Characterizing the key aroma-active compounds can provide a theor. foundation for the practical aroma quality evaluation of Congou black tea and directional processing technol. of high-quality black tea with floral or sweet odors. Gas chromatog.-olfactometry (GC-O) combined with odor activity value (OAV) is often used to screen key aroma-active substances, but the interaction between aroma components and their impact on the overall sensory quality is ignored. Therefore, in this study, OAV combined with variable importance in projection (VIP) and Spearman correlation anal. (SCA) were used to characterize the aroma-active components of Congou black teas with floral and sweet odors. Eighty-five volatiles were identified in these samples using gas chromatog.-mass spectrometry (GC-MS). Twenty-three compounds were identified as potential markers for the floral and sweet odors of Congou black teas from orthogonal partial least squares discriminant anal. (OPLS-DA). Eighteen compounds were selected as candidate aroma compounds based on GC-O anal. and OAV calculations In addition, 26 compounds were screened as crucial aroma compounds based on SCA. Finally, 19 compounds were evaluated as key aroma compounds by the comprehensive evaluation of VIP, OAV, and SCA. Terpenoids are the main active compounds that contribute to the floral odor of Congou black tea, whereas aldehydes are the key compounds for the sweet odor. The proposed method can effectively screen the aroma-active compounds and can be used for comprehensive quality control of products. 2022 Society of Chem. Industry. In the experiment, the researchers used many compounds, for example, Oct-1-en-3-ol (cas: 3391-86-4Electric Literature of C8H16O).
Oct-1-en-3-ol (cas: 3391-86-4) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. A multistep synthesis may use Grignard-like reactions to form an alcohol with the desired carbon structure, followed by reactions to convert the hydroxyl group of the alcohol to the desired functionality.Electric Literature of C8H16O
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