Organizations: Environmental Isotopes Variables: oxygen_saturation total_cell_concentration Substances: Argon (InChI=1S/Ar) Krypton (InChI=1S/Kr) Nitrate (InChI=1S/NO3/c2-1(3)4/q-1) Oxygen (InChI=1S/O2/c1-2) Keywords: noble gases groundwater