Variables: dissolved_oygen electric_conductivity Substances: 2 -2 -Difluorodeoxyuridin (FIRDBEQIJQERSE-QPPQHZFASA-N) 3-5-dibromo-4-hydroxybenzoic acid (PHWAJJWKNLWZGJ-UHFFFAOYSA-N) Systems: groundwater Keywords: high resolution mass spectrometry MetFrag micropollutants monitoring