科研之友
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摘要
For the first time, the isotope ratio of lead is reported in Brazilian red wines. The lead concentration and the ratios of Pb-204/Pb-206, Pb-207/Pb-206 and Pb-208/Pb-206 were determined in 94 red wines produced in Campanha Gaucha, Serra Gaucha, Vale dos Vinhedos in Southern Brazil and Vale do Sao Francisco in Northeastern Brazil. The values observed for the isotopic ratios were consistent with those reported in the literature for wines of South America. The lead isotopic ratios showed no statistically significant differences among the vineyards of the Southern region; on the other hand, the vineyard from the Northeastern region showed large variations in its ratios. The Pb-204/Pb-206 ratio data demonstrated that the wines of the Southern region have radiogenic features, whereas the wines of the Northeastern region ranged from slightly to very radiogenic. These results indicated that the lead concentrations in the wines from these Brazilian regions are influenced both by agricultural practices and by natural occurrences. Isotope ratios allowed for differentiation among the wines produced in these two important wine producing areas in Brazil and are emerging as a promising tool in the study of the geographical origin of Brazilian wines.
- 出版日期2016-6
