Variables: dissolved_oygen total_organic_carbon concentration electric_conductivity Substances: 18-beta-Glycyrrhetinic acid (MPDGHEJMBKOTSU-YKLVYJNSSA-N) 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N) Keywords: high resolution mass spectrometry micropollutants monitoring pesticides metabolites land use