Variables: dissolved_oygen dissolved_organic_carbon total_organic_carbon pH Keywords: high resolution mass spectrometry Substances: Adenosine (OIRDTQYFTABQOQ-UHFFFAOYSA-N) 1-(3-Trifluoromethylphenyl)-piperazine (KKIMDKMETPPURN-UHFFFAOYSA-N) 2 -2 -Difluorodeoxyuridin (FIRDBEQIJQERSE-QPPQHZFASA-N)