| Applications | Dissolved nitrate isotope analysis (d15N, d18O) in groundwater, surface water, seawater; atmospheric greenhouse gas analysis (CO2, N2O, CH4); nitrogen cycle research; soil and organic material isotope analysis | Geochemistry, geology, climate change, hydrology, food authenticity, food adulteration, ecology, petroleum geoscience, archaeology, forensics, sports doping, environmental science, oceanography |