Variables: electric_conductivity Keywords: monitoring high resolution mass spectrometry pesticides metabolites Systems: groundwater Substances: Acetazolamide (BZKPWHYZMXOIDC-UHFFFAOYSA-N) 18-beta-Glycyrrhetinic acid (MPDGHEJMBKOTSU-YKLVYJNSSA-N) 1-Naphthylacetic acid (PRPINYUDVPFIRX-UHFFFAOYSA-N) 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N)