Lead isotopic signatures of wine and vineyard soils—tracers of lead origin

The Pb contents and ²⁰⁶Pb/²⁰⁷Pb and ²⁰⁸Pb/²⁰⁶Pb isotopic ratios were studied in the soils and wines (2004 harvest) of three vineyard areas of the Czech Republic. The areas differ in their geological basements and anthropogenic loading. The isotopic compositions of wine in areas with intensive industry (Most, North Bohemia ²⁰⁶Pb/²⁰⁷Pb_wine = 1.178 ± 0.004) and the agricultural areas of Central Bohemia (Roudnice nad Labem ²⁰⁶Pb/²⁰⁷Pb_wine = 1.176 ± 0.007) are similar to the Pb isotopic composition of airborne particulate material typical of polluted and industrial environments (²⁰⁶Pb/²⁰⁷Pb = 1.17–1.19). The isotopic composition of wine from Prague (²⁰⁶Pb/²⁰⁷Pb_wine = 1.174 ± 0.003) is different from that of the soil, which was severely contaminated in the past by vehicular Pb (²⁰⁶Pb/²⁰⁷Pb_soil = 1.147–1.168). This fact shows that interception of airborne Pb by plants is greater than its uptake by the root system.