title: Stable isotopes determination in some Romanian wines.
abstract: This paper presents a study concerning the isotopic fingerprint ((18)O and (13)C) of some wines prepared from relevant Romanian grape varieties (e.g. Feteasca Alba (FA), Feteasca Regala (FR) and Cabernet Sauvignon (CS)) obtained in different vintage years (2002, 2003, 2004, 2007 and 2008). These wines were obtained from different vineyards having a significant role in the wine market: Cotesti, Tohani, Stefanesti, Aiud, Cotnari, Bucium, Murfatlar, Bujoru, Dragasani and Valea Calugareasca. Several observations related to the dependence of isotope ratios on geographical origin and climatic conditions were drawn. The authentic wines obtained from the FA grape variety from six different vineyards showed δ(18)O values in the range of+3.28 (Cotesti region - 45 °38'N/27 °04'E) to-2.60 ‰ (Aiud region - 46 °19'N/23 °45'E). The δ(13)C values were very similar for all the samples with an average of about-26 ‰. The difference between the δ(18)O values was due to the different climatic zones, which have an influence on the δ(18)O values of wine water. For the wine variety CS obtained from the Dealu Mare-Tohani vineyard, production years 2003 and 2004, a greater difference in the δ(18)O values of wine water ranging from 1.89 (in 2004) to 5.35 ‰ (in 2003) was noted. This difference is explained by the different mean annual temperatures in 2003 and 2004.
authors.affiliation: Department of Mass Spectrometry, Chromatography and Applied Physics, National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca, Romania.
authors.forename: Dana Alina
authors.initials: DA
authors.lastname: Magdas
authors.forename: Stela
authors.initials: S
authors.lastname: Cuna
authors.forename: Gabriela
authors.initials: G
authors.lastname: Cristea
authors.forename: Roxana Elena
authors.initials: RE
authors.lastname: Ionete
authors.forename: Diana
authors.initials: D
authors.lastname: Costinel
mesh_terms: D002247:Carbon Isotopes / Q000032:analysis; D002980:Climate; D000431:Ethanol / Q000302:isolation & purification; D005285:Fermentation; D013058:Mass Spectrometry; D010103:Oxygen Isotopes / Q000032:analysis; D012383:Romania; D012621:Seasons; D027843:Vitis / Q000737:chemistry* / Q000145:classification / Q000254:growth & development; D014920:Wine / Q000032:analysis*
chemical_list: D002247:Carbon Isotopes; D010103:Oxygen Isotopes; D000431:Ethanol