Advanced Isotopic Analysis (AIA), Hélioparc Pau-Pyrénées, 2, Avenue du Président Angot, 2, 64000 Pau, France; Laboratoires des Pyrénées et des Landes (LPL), Rue des Écoles, 64150 Lagor, France.
Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, CNRS/University of Pau & Pays Adour, UMR5254, Hélioparc Pau-Pyrénées, 2, Avenue du Président Angot, 64053 Pau Cedex 9, France.
Food Chem. 2020 Jan 15;303:125277. doi: 10.1016/j.foodchem.2019.125277. Epub 2019 Jul 29.
Lead concentrations and lead isotope ratios of 43 authentic Bordeaux wines from prestigious châteaux and 14 suspicious Bordeaux origin were determined to evaluate their potential for authenticity and geographical origin assessment. Results have shown that the total Pb concentrations in Bordeaux wines drastically decreased over the previous 50 years with a clear shift of isotopic signatures towards geogenic values corresponding to an overall trend of European environmental lead monitoring. The Pb isotopic ratios determined in both series of samples clearly demonstrated that suspicious Bordeaux wines displayed Pb isotopic signatures statistically distinctive from those obtained for authentic wines. This observation was confirmed by the three-isotope mixing lines obtained between the geogenic and the anthropogenic Pb isotopes data that characterize European and Asian sources. The use these specific three-isotope plots allows a non-ambiguous discrimination between authentic Pauillac AOC and the counterfeited ones.
为了评估其真实性和产地评估的可能性，测定了 43 款来自著名酒庄的正宗波尔多葡萄酒和 14 款可疑波尔多产地葡萄酒的铅浓度和铅同位素比值。结果表明，过去 50 年来，波尔多葡萄酒中的总铅浓度急剧下降，同位素特征明显向地球成因值偏移，这对应于欧洲环境铅监测的总体趋势。在这两组样品中测定的铅同位素比值清楚地表明，可疑的波尔多葡萄酒的铅同位素特征与从正宗葡萄酒中获得的特征在统计学上明显不同。这一观察结果得到了通过地球成因和人为铅同位素数据之间的三条同位素混合线得到了证实，这些数据可以描述欧洲和亚洲的来源。这些特定的三同位素图的使用允许在正宗的波尔多上梅多克 AOC 和假冒的产品之间进行明确的区分。
