Comparative analysis of different grades of Tieguanyin oolong tea based on metabolomics and sensory evaluation

文献类型： 外文期刊

第一作者： Zeng, Lin

作者： Zeng, Lin;Fu, Yan-Qing;Liu, Yu-Yi;Chen, Jian-Xin;Yin, Jun-Feng;Xu, Yong-Quan;Zeng, Lin;Jin, Shan;Sun, Wei-Jiang;Liu, Yu-Yi;Huang, Jin-Shui

作者机构：

关键词： Grades; Flavor-contributing metabolites; Catechins; Aroma; Antioxidant capacity

期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：6.0； 五年影响因子：6.0 ）

ISSN： 0023-6438

年卷期： 2023 年 174 卷

页码：

收录情况： SCI

摘要： To develop objective methods of oolong tea grading for importers and customs, metabolomics and sensory evaluation were applied to screen the characteristic compounds associated with Tieguanyin (TGY) tea grades T, 1, 2, and 3, and types (fresh scent flavor and high fragrance). With decreasing TGY grade/quality, the astringency and content of most flavonoid glycosides increased (especially catechin and epicatechin). The floral aroma of fresh scent flavor TGY decreased, and the roasted aroma of high-fragrance TGY increased with decreasing TGY grade. Five non-volatile compounds (epicatechin gallate, quercetin-3-O-galactoside, quercetin-3-O-rutinoside, epicatechin, and gallocatechin) and five volatile compounds (benzyl benzoate, beta-phenylethyl acetate, 6-methyl5-hepten-2-one, heptanal, and (E)-2-hexenal) were identified, which could readily distinguish different grades of fresh scent flavor and high fragrance TGY by quantitative chemical analysis. Lower grades of TGY had inferior flavor, but higher antioxidant capacity.

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