Variables: electric_conductivity dissolved_organic_carbon Substances: 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N) 3-Phenoxybenzoeacid (NXTDJHZGHOFSQG-UHFFFAOYSA-N) 1-Methyl-Benzotriazole (HXQHRUJXQJEGER-UHFFFAOYSA-N)