Variables: dissolved_organic_carbon electric_conductivity Keywords: MetFrag high resolution mass spectrometry pesticides metabolites micropollutants Substances: 18-beta-Glycyrrhetinic acid (MPDGHEJMBKOTSU-YKLVYJNSSA-N) 1-Methyl-Benzotriazole (HXQHRUJXQJEGER-UHFFFAOYSA-N)