Journal
FOOD ADDITIVES AND CONTAMINANTS
Volume 17, Issue 6, Pages 435-445Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02652030050034019
Keywords
lead concentration; isotopic composition; wine; temporal evolution; authenticity
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Over the last century, the atmospheric fallout of anthropogenic lead has evolved with time, as a function of the chronological variability of transient lead inputs from both industrial and gasoline origins. This variability has been mostly documented over North America and northern Europe. In this study we used ICP-MS for the determination of lead isotope ratios and showed that a series of French wines followed the evolution of the environmental lead record over the last century. We observe the same three-step chronological evolution of the lead isotopic composition, which reflects a western European signal. In the post 1950 vintages, the lead isotope composition reflects a dominant atmospheric fallout. Since similar to 1950, Pb concentrations have been much lower than before, decreasing consistently from similar to 0.25 mg l(-1) around the early 1950s, down to less than similar to 0.1 mg l(-1) nowadays. Reflecting the airborne pollution, the lead isotopic signature is also specific of the continental origin of the wines and lead isotope ratios determination in wines appears to be a promising tool for certifying wine authenticity.
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