The determination of 206Pb/207Pb, 208Pb/206Pb and 87Sr/86Sr isotope rations by ICP-MS for fingerprinting the South-East Romanian wines

. Geographical origin of wine based on its chemical composition is one of the most challenging issues in relation to wine authenticity. In the last decade, many efforts have been made to identify the potential markers and develop reliable analytical methods to determine the wines authenticity. Among these “fingerprints”, the isotopic rations play an increasingly important role. In this research, the determination of the 206Pb/207Pb, 208Pb/206Pb and 87Sr/86Sr isotope rations in the wines from Dealu Bujorului vineyard (S-E) Romania using ICP-MS technique was performed. The wine samples resulted from micro-wine production. Regarding the concentration of lead in the analysed samples of wine, we can see that lead varies within a wide range (46.59±0.57 µg/L and 9.78±0.58 µg/L). Based on the statistical analysis is proven that the wine produced from Fetească Neagră (46.59±0.57 µg/L [2014]), (38.68±0.87 µg/L [2015]) followed by the wine produced from Fetească Albă (31.57±0.39 µg/L [2014], (31.96±1.41 µg/L [2015]) have recorded the highest concentration of this heavy metal. In contrast, the lowest concentration was recorded in the wines made from the variety of Băbească Neagră (9.78±0.58 µg/L [2014]) and from Cabernet Sauvignon (10.00±1.45 µg/L [2015]). Regarding the concentration of strontium from the samples of wine, and based on the results we can see that the concentration of this heavy metal varies within a wide range (418.87±18.03 µg/L and 129.60±5.12 µg/L). The highest concentrations were recorded in the wine produced from Fetească Neagră (418.87±18.03 µg/L [2014] and 387.38±8.36 µg/L [2015]), followed by Cabernet Sauvignon (323.35±10.22 µg/L [2014] and (360.95±15.94 µg/L [2015]). Regarding 206Pb/207Pb isotopic ration based on analyses we can say that Muscat Ottonel variety exhibited 1.1038±0.0175 (1.5886%) (2014) Băbească Gri variety 1.1079±0.0135 (0.2143%) (2014) and Șarba variety 1.0417±0.0160 (1.5404%) (2014). The higher mean of 87Sr/86Sr isotopic ration was obtained by the Merlot variety 1.3617±0.0517 (3.7979 %) (2015) and Burgund Mare Roze 1.3378±0.0240 (1.7939 %) (2015).