Variables: dissolved_organic_carbon electric_conductivity Substances: 1-Naphthylacetic acid (PRPINYUDVPFIRX-UHFFFAOYSA-N) 2 -2 -Difluorodeoxyuridin (FIRDBEQIJQERSE-QPPQHZFASA-N) Acetochlor (VTNQPKFIQCLBDU-UHFFFAOYSA-N) Systems: groundwater Keywords: MetFrag micropollutants high resolution mass spectrometry