Variables: total_organic_carbon pH electric_conductivity Substances: 1-3-Dimethyl-2-imidazolidinon (CYSGHNMQYZDMIA-UHFFFAOYSA-N) 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N) Keywords: monitoring MetFrag high resolution mass spectrometry pesticides metabolites land use