Variables: dissolved_oygen dissolved_organic_carbon total_organic_carbon Keywords: high resolution mass spectrometry Systems: groundwater Substances: 6-benzyladenine (NWBJYWHLCVSVIJ-UHFFFAOYSA-N) 1-Hydroxy-Benzotriazole (ASOKPJOREAFHNY-UHFFFAOYSA-N) 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N)