Variables: electric_conductivity pH Substances: 1-(3-Trifluoromethylphenyl)-piperazine (KKIMDKMETPPURN-UHFFFAOYSA-N) 2 -2 -Difluorodeoxyuridin (FIRDBEQIJQERSE-QPPQHZFASA-N) Keywords: monitoring MetFrag micropollutants high resolution mass spectrometry pesticides metabolites land use