DETERMINATION OF COLOR AND ANTHOCYANINS IN THREE ROMANIAN RED WINES

Cristina GHINEA, Ana LEAHU, Florin URSACHE

Abstract

In this study UV-VIS spectrophotometer and CM 700 D spectrophotometer - KONICA MINOLTA Colorimeter (CieLab Method) were used to investigate the anthocyanins content and color of three Romanian red wines. The samples were purchased from three different Romanian vineyards located in different regions of the country (South East Development Region (SEDR), South-Muntenia Development Region (SMDR) and South West Oltenia Development Region (SWODR)). In total, nine samples of red wine Feteasca Neagra, Cabernet Sauvignon and Merlot, the harvest of 2012, were analyzed. During this study chromatic parameters as L *, a *, b *, C * and H0 were determined. The degree of brightness is indicated by the L * parameter and according to our results it is between 0.27 (darkest) for Merlot wine from the Vineyard located in South West Oltenia Development Region and 15.48 for the Feteasca Neagra wine from the Vineyard located in South-Muntenia Development Region. The results showed that chromatic parameter a, located on the color coordinate red-green, has values ranging from -0.09 (Feteasca Neagra from SMDR) and 1.47 (Cabernet Sauvignon from SMDR). The highest total anthocyanins content of the Feteasca Neagra wine was recorded in the vineyard located in the SWODR (251 mg/L), followed by the vineyard located in the SEDR, and the lowest content (97 mg/L) was recorded for the wine from the vineyard located in the SMDR. Feteasca Neagra, Cabernet Sauvignon and Merlot wines have different anthocyanins content from one vineyard to another, demonstrating that the variation of anthocyanins and implicitly variation in wine color is influenced by pedo-climatic conditions in the area, cultivated varieties and vinification technology applied.

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