Variables: dissolved_organic_carbon pH Substances: 1-(3-Trifluoromethylphenyl)-piperazine (KKIMDKMETPPURN-UHFFFAOYSA-N) 3-5-dibromo-4-hydroxybenzoic acid (PHWAJJWKNLWZGJ-UHFFFAOYSA-N) Keywords: monitoring high resolution mass spectrometry pesticides metabolites