Variables: dissolved_organic_carbon electric_conductivity concentration Substances: 1-(3-Chlorophenyl)-piperazin (VHFVKMTVMIZMIK-UHFFFAOYSA-N) 5-Methylpyridine-3-carboxylic-acid (DJDHHXDFKSLEQY-UHFFFAOYSA-N) Keywords: high resolution mass spectrometry monitoring