Understanding the aroma diversity of Dancong tea (Camellia sinensis) from the floral and honey odors: Relationship between volatile compounds and sensory characteristics by chemometrics was written by Chen, Wei;Hu, Die;Miao, Aiqing;Qiu, Guangjun;Qiao, Xiaoyan;Xia, Hongling;Ma, Chengying. And the article was included in Food Control in 2022.Quality Control of 5-Ethyldihydrofuran-2(3H)-one This article mentions the following:
Dancong is a Chinese oolong tea famous for its aroma diversity. However, this diversity in characteristic is challenging to be clarified in either sensory or chem. aspects. In this study, the aromas from Dancong teas were characterized based on the typical odors of “floral” and “honey”. The volatile compounds underlying the odors were investigated through chemometrics. Seventy Dancong teas of various categories were collected to approx. the diversity in aroma. According to the sensory evaluation, the floral or honey odor was detected in every sample. For volatile characterization, 57 compounds were identified by gas chromatog.-mass spectrometry (GC-MS) coupled with headspace-solid phase microextraction (HS-SPME) across samples. The difference in floral and honey odors was related to volatile variation among the teas, as both the odor-based classification and the volatile-based unsupervised learning analyses yielded consistent sample clustering patterns. Nine volatiles were identified as putative markers for the odor difference, where indole, (E)-nerolidol, 2-phenylacetonitrile, and γ-caprolactone accounted for the floral odor predominance, while hexyl 2-methylbutanoate, (Z)-3-hexenyl pentanoate, (Z)-linalool oxide (pyranoid), (E)-linalool oxide (furanoid), and (Z)-linalool oxide (furanoid) contributed to the honey odor perception. These results point to a volatile-endorsed categorization framework based on the floral and honey odors that can assist in Dancong aroma quality control. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Quality Control of 5-Ethyldihydrofuran-2(3H)-one).
5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Quality Control of 5-Ethyldihydrofuran-2(3H)-one
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