Department of Biotechnology, Microbiology and Human Nutrition, Faculty of Food Science and Biotechnology, University of Life Sciences in Lublin, 8 Skromna Street, 20-704 Lublin, Poland.
Department of Food Technology and Human Nutrition, College of Natural Science, Rzeszów University, 4 Zelwerowicza Street, 35-601 Rzeszów, Poland.
Molecules. 2020 Mar 16;25(6):1342. doi: 10.3390/molecules25061342.
The authentication of grape variety from which wine is produced is necessary for protecting a consumer from adulteration and false labelling. The aim of this study was to analyze phenolic compounds in red monovarietal wines produced from Zweigelt () and Rondo (non-) varieties while using the UPLC-PDA-MS/MS method and to assess whether these wines can be classified according to grape variety that is based on chemometric analysis. Fifty-five phenolic compounds belonging to five classes-anthocyanins, flavonols, flavan-3-ols, phenolic acids, and stilbenes-were identified and quantified in Zweigelt and Rondo wines. The wines of the Zweigelt variety were characterized by lower concentrations of phenolic compounds than those of the Rondo variety. Furthermore, wines of the Zweigelt variety contained the highest concentrations of flavan-3-ols, and wines of the Rondo variety-the highest concentrations of anthocyanins. Hierarchical cluster analysis (HCA) revealed that Zweigelt wines and Rondo wines formed two separate groups. The Rondo group was divided into two subgroups, differing in type of malolactic fermentation (spontaneous or induced). Phenolic compounds analysis by means of UPLC-PDA-MS/MS combined with HCA is a useful tool for the classification of red wines that were produced from Zweigelt and Rondo grape varieties, regardless of yeast strain and type of malolactic fermentation.
从生产葡萄酒的葡萄品种中进行品种鉴定，对于保护消费者免受掺假和虚假标签的影响是必要的。本研究的目的是使用 UPLC-PDA-MS/MS 方法分析由 Zweigelt()和 Rondo()品种生产的红单品种葡萄酒中的酚类化合物，并评估这些葡萄酒是否可以根据葡萄品种进行分类，这是基于化学计量分析的。在 Zweigelt 和 Rondo 葡萄酒中鉴定和定量了属于五类的 55 种酚类化合物：花青素、类黄酮、黄烷醇、酚酸和芪。Zweigelt 品种的葡萄酒中酚类化合物的浓度低于 Rondo 品种的葡萄酒。此外，Zweigelt 品种的葡萄酒含有最高浓度的黄烷醇，而 Rondo 品种的葡萄酒则含有最高浓度的花青素。层次聚类分析（HCA）表明，Zweigelt 葡萄酒和 Rondo 葡萄酒形成了两个独立的群体。Rondo 组又分为两个亚组，其区别在于苹果酸-乳酸发酵的类型（自然或诱导）。通过 UPLC-PDA-MS/MS 进行的酚类化合物分析与 HCA 相结合，是对由 Zweigelt 和 Rondo 葡萄品种生产的红葡萄酒进行分类的有用工具，无论酵母菌株和苹果酸-乳酸发酵的类型如何。
