1. Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research─UFZ, Permoserstr. 15, 04318 Leipzig, Germany
2. Department of Applied Geosciences - Aquatic Geochemistry and Hydrogeology, Institute for Geosciences, Competence Centre for Geoenergy (KGE), 24118 Kiel, Germany
3. Department of Monitoring & Exploration Technologies, Helmholtz Centre for Environmental Research─UFZ, Permoserstr. 15, 04318 Leipzig, Germany
4. Department of Environmental Microbiology, Helmholtz Centre for Environmental Research─UFZ, Permoserstr. 15, 04318 Leipzig, Germany
5. Isodetect GmbH, Deutscher Platz 5b, 04103 Leipzig, Germany