OP A6. ATTENDANCE OF STABLE ISOTOPES IN QUALITY WINES

Z. Kelemen,A. Bauer, B. Marošanović

Department of Instrumental Analysis, SP Laboratory, 21220 Becej

Stable isotope ratios D/H, 13C/12C and 18O/16O of wine ethanol have been determined by continuous flow – isotope ratio mass spectrometry (CF – IRMS), in about 30 samples of commercial wines, from 7 countries. All samples were quality wines produced in year 2006. The isotope ratios of carbon, hydrogen and oxygen of wines were determined to distinguish them according to the geographical origin, and to detect an eventually chaptalization with cane sugar. On the other hand, differentiation of wines chaptalized with beet sugar is not possible with this method. Distinction among wines with different regional origin with isotopic methods is very promising, but it requires a database created using authentic wines.