Polytechnic Institute of Viseu (Centre for the Study of Education, Technologies and Health), Agrarian Higher School, Department of Food Industries, Estrada de Nelas, Quinta da Alagoa, Ranhados, Viseu, Portugal.
J Sci Food Agric. 2013 Aug 15;93(10):2486-93. doi: 10.1002/jsfa.6064. Epub 2013 Mar 4.
The main aim of this work was to evaluate the general phenolic composition, individual anthocyanin content and total antioxidant capacity from 20 commercial matured red wine samples (vintage from 2005 to 2008) produced in two Appellations of Origin from the north of Portugal: Douro and Dão.
The results showed that the levels of general phenolic compounds, individual anthocyanins and antioxidant capacity in the 20 matured red wine samples analysed differed significantly. In addition, matured red wine samples aged in oak wood had a lower total individual anthocyanin content (from 13.85 to 56.79 mg L(-1), averaging 46.13 mg L(-1)) than wines aged in bottle (from 25.93 to 252.82 mg L(-1), averaging 94.17 mg L(-1)). The total antioxidant capacity values of the analysed wines showed quantitative differences among the values obtained from each antioxidant method applied as well as differences in the range of variation, especially for the values obtained by the DPPH method.
The wines used in this study constitute quite a heterogeneous group, made from different Portuguese red grape varieties, with diverse ages and two ageing processes (bottle and oak wood barrels); and accordingly, they showed important differences, especially in their phenolic composition. Finally, the oak wood ageing process before bottling had a negative effect in individual anthocyanins content in contrast to matured red wines submitted only to a bottle ageing process.
本研究的主要目的是评估来自葡萄牙北部两个产区（杜罗和道奥）的 20 种商业化成熟红葡萄酒（2005 至 2008 年份）的总酚类成分、单体花青素含量和总抗氧化能力。
结果表明，20 种成熟红葡萄酒样品的总酚类化合物、单体花青素和抗氧化能力水平存在显著差异。此外，橡木桶陈酿的成熟红葡萄酒样品的总单体花青素含量（13.85 至 56.79mg/L，平均 46.13mg/L）低于瓶陈酿葡萄酒（25.93 至 252.82mg/L，平均 94.17mg/L）。所分析葡萄酒的总抗氧化能力值在应用的每种抗氧化方法获得的值之间存在定量差异，以及在变化范围方面存在差异，尤其是 DPPH 方法获得的值。
本研究使用的葡萄酒来自不同的葡萄牙红葡萄品种，具有不同的年龄和两种陈酿过程（瓶陈和橡木桶陈），因此构成了一个相当异质的群体；相应地，它们表现出重要的差异，尤其是在酚类成分方面。最后，与仅经过瓶陈酿过程的成熟红葡萄酒相比，装瓶前的橡木桶陈酿过程对单体花青素含量有负面影响。
