Das Verhältnis der Stabilisotopen18O und16O zur Beurteilung von Auslandswein

The relation of the stabile isotopes¹⁸O/¹⁶O was determined as deviation from an internationally accepted standard (Delta-value in per mil.; standard SMOW) with SIRA in 359 wines of Tunis, Portugal, Greece, Italy, Spain and Hungary. The determined relation is primary influenced by the geografical latitude of the wine region. The influence of the year and the climatic effect of certain areas increases from the south to the north. The results of individual climatical homogeneous areas are combined. They can serve as provisional base of knowledge in order to indicate the addition of water and false declarations of the origin of wines. Furthermore, information is given about the Delta-values of the ground-water of different regions, which are completely negative. Examples were given how to quantify the addition of water by using the Delta-values of authentic wines and ground-water. Some examples for falsification of wines are described. What ist further needed for using the¹⁸O/¹⁶O-ratio in the routine analysis of wines is discussed.