Variables: dissolved_oygen electric_conductivity concentration Keywords: high resolution mass spectrometry Substances: 5-Chloro-2-methyl-4-isothiazolin-3-on (CMI) (DHNRXBZYEKSXIM-UHFFFAOYSA-N) 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N)