Variables: dissolved_organic_carbon total_organic_carbon concentration Keywords: high resolution mass spectrometry Systems: groundwater Substances: 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N) 1-(3-Trifluoromethylphenyl)-piperazine (KKIMDKMETPPURN-UHFFFAOYSA-N)