This website no longer supports Internet Explorer 11. Please use a more up-to-date browser such as Firefox, Chrome for better viewing and usability.

Project Wasserzeichen (Project Watermark)

As part of the watermark project, 1000 reference samples of the products milk, pork, beef, wheat, carrots, eggs, apples, potatoes and soy were taken from 484 locations and farms in the federal state of Hesse and analysed for the isotope ratios of 18O/16O, D/H, 13C/12C, 15N/14N and 34S/32S. In the query below, these reference data are made available for the comparison of isotope values of practical samples. The number of sampling locations, the mean value and the "2* Sigma" range (µ ± 2σ) for the selected product and postal code region are displayed. If the postal code region is not restricted, the corresponding data for the whole of Hesse is displayed.