Professor Elsner (b. 1972) develops analytical methods to investigate the fate of chemicals and microorganisms in complex systems. Besides laser analysis, particle analysis, and bio-analytics, research at the Institute of Hydrochemistry is focused on compound-specific isotope analysis to measure isotope effects at natural abundance. Through innovative analytical methods, the Institute contributes to improvements in the management of chemicals in the environment, helps to establish the self-purification potential of natural systems and helps to optimize turnover in technical systems.