Comparison of rose wines according to the content chosen phenolic compounds and antiradical activity.

Abstract

Rosé wines has gained a great popularity not only in Czech Republic but also elsewhere in the world. Rosé are produced mostly from traditional varieties such as 'Pinot Noir', 'Blaufrankisch' (Lemberger), 'Zweigeltrebe', 'Merlot' and 'Cabernet Sauvignon'. Entirely new act play rosé wines made from blue Czech interspecific grape varieties, such as 'Cerason' or 'Laurot'. For samples of wines (concrete 'Laurot', 'Cerason', 'Kofranka', 'Pinot noir', 'Merlot' and 'Blaufrankisch') are normally carried out measurements of fundamental analytical values. Furthermore, spectrophotometric measurements were carried out - determination of total phenols, total anthocyanins and the optical density at 280 nm (OD280), total flavanols, reducing power and antiradical activity. The results show that most phenolic compounds and highest antiradical activity has the variety 'Laurot'. This variety has besides ideal pink color for rosé wine similarly as 'Blaufränkisch' variety. The new interspecific varieties were higher antiradical activity and therefore health benefits. When choosing a suitable technology for its fruitiness, higher acidity and higher resistance to fungal diseases appear to be interesting for the production of rosé wines, not only from organic production.Rosé wines has gained a great popularity not only in Czech Republic but also elsewhere in the world. Rosé are produced mostly from traditional varieties such as 'Pinot Noir', 'Blaufrankisch' (Lemberger), 'Zweigeltrebe', 'Merlot' and 'Cabernet Sauvignon'. Entirely new act play rosé wines made from blue Czech interspecific grape varieties, such as 'Cerason' or 'Laurot'. For samples of wines (concrete 'Laurot', 'Cerason', 'Kofranka', 'Pinot noir', 'Merlot' and 'Blaufrankisch') are normally carried out measurements of fundamental analytical values. Furthermore, spectrophotometric measurements were carried out - determination of total phenols, total anthocyanins and the optical density at 280 nm (OD280), total flavanols, reducing power and antiradical activity. The results show that most phenolic compounds and highest antiradical activity has the variety 'Laurot'. This variety has besides ideal pink color for rosé wine similarly as 'Blaufränkisch' variety. The new interspecific varieties were higher antiradical activity and therefore health benefits. When choosing a suitable technology for its fruitiness, higher acidity and higher resistance to fungal diseases appear to be interesting for the production of rosé wines, not only from organic production.

Keywords

• interspecific variety
• healthy substance
• antiradical activity
• reducing power
• flavanols