Skendi Adriana, Papageorgiou Maria, Stefanou Stefanos
Department of Agricultural Biotechnology and Enology, International Hellenic University, 1st Km Dramas-Mikroxoriou, GR-66100 Drama, Greece.
Department of Food Science and Technology, International Hellenic University, POB 141, GR-57400 Thessaloniki, Greece.
Foods. 2020 Nov 5;9(11):1607. doi: 10.3390/foods9111607.
The present study is aimed to analyze the composition of microelements in wines prepared by amateur winemakers in Drama region (recognized as Protected Geographical Indication (PGI)), especially the toxic ones, as well as the phenolic content and antioxidant activity of these wines since moderate wine consumption may contribute to health benefits to the consumers. A total of twenty-four wines, comprising sixteen red and eight white, were tested. The micro and macroelements were determined with ICP-OES (Inductively coupled plasma-optical emission spectrometry). Chromatic characteristics of wines and total phenolic and flavonoid compounds as well as their antioxidant activity with three different assays were determined spectrophotometrically. The amateur's wines showed levels of contaminants with toxic metals less than the limits set from the International Organization of Vine and Wine (OIV). Moreover, toxic metals concentrations were comparable to those of European wines. The Principal Component Analysis discriminated wines into white and red and further distinguished the red wine into two groups depending on the Total Flavonoid content, antioxidant activity and color intensity. The moderate consumption of amateur wines can be recommended since their consumption is not harmful to the health, and they contain high amount of phenolics and flavonoids comparable or even higher to that of commercial wines.
本研究旨在分析德拉马地区（被认定为受保护地理标志（PGI））业余酿酒师所酿葡萄酒中的微量元素组成，尤其是有毒元素，以及这些葡萄酒的酚类物质含量和抗氧化活性，因为适度饮用葡萄酒可能对消费者健康有益。共测试了24种葡萄酒，其中包括16种红葡萄酒和8种白葡萄酒。采用电感耦合等离子体发射光谱法（ICP-OES）测定微量和常量元素。通过分光光度法测定葡萄酒的色度特征、总酚和黄酮类化合物以及它们在三种不同测定方法下的抗氧化活性。业余酿酒师所酿葡萄酒中有毒金属污染物的含量低于国际葡萄与葡萄酒组织（OIV）规定的限值。此外，有毒金属浓度与欧洲葡萄酒相当。主成分分析将葡萄酒分为白葡萄酒和红葡萄酒，并根据总黄酮含量、抗氧化活性和颜色强度将红葡萄酒进一步分为两组。由于饮用业余酿酒师所酿葡萄酒对健康无害，且其酚类和黄酮类化合物含量高，与商业葡萄酒相当甚至更高，因此建议适度饮用。
