Variables: dissolved_oygen dissolved_organic_carbon Substances: 1-(3-Trifluoromethylphenyl)-piperazine (KKIMDKMETPPURN-UHFFFAOYSA-N) 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N) Systems: groundwater Keywords: MetFrag high resolution mass spectrometry pesticides metabolites