Variables: dissolved_oygen Substances: 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N) 2 -3 -di-O-acetyl-5 -deoxy-5-fluorocytidin (NWJBWNIUGNXJGO-RPULLILYSA-N) Keywords: high resolution mass spectrometry land use