Variables: total_organic_carbon electric_conductivity concentration Keywords: MetFrag high resolution mass spectrometry Systems: groundwater Substances: Acesulfame (YGCFIWIQZPHFLU-UHFFFAOYSA-N) 18-beta-Glycyrrhetinic acid (MPDGHEJMBKOTSU-YKLVYJNSSA-N) 1-(3-Chlorophenyl)-piperazin (VHFVKMTVMIZMIK-UHFFFAOYSA-N)