In this study, the lead isotope signature was tested with the aim to verify its potential as geographic tracer for wine production and particularly for the Lambrusco PDO wines of the province of Modena (Italy). A solid phase extraction procedure, for separating lead from the investigated matrices, soil and wine, was optimized. Furthermore, different mathematical models, based on an exponential law and internal or external correction approach, were evaluated for the correction of instrumental mass dependent fractionation. The optimized analytical procedure yielded isotopic ratio data relative to the lead NIST 981 standard, 208Pb/206Pb = 2.16664 and 207Pb/206Pb = 0.914645, in good agreement both with the tabulated values and with the most recent literature data. Measured isotope ratio data highlight the contribute of multiple lead sources in bottled wine but different from the one present in soils.

中文翻译：

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使用铅同位素比率作为 Lambrusco PDO 葡萄酒的地理示踪剂

在这项研究中，测试了铅同位素特征，目的是验证其作为葡萄酒生产地理示踪剂的潜力，特别是摩德纳省（意大利）的兰布鲁斯科 PDO 葡萄酒。优化了用于从所研究的基质、土壤和酒中分离铅的固相萃取程序。此外，评估了基于指数定律和内部或外部校正方法的不同数学模型，用于校正仪器质量相关的分馏。优化的分析程序产生了相对于 NIST 981 铅标准的同位素比数据，208Pb/206Pb = 2.16664 和 207Pb/206Pb = 0.914645，与列表值和最新文献数据都非常吻合。