Keywords: micropollutants Substances: 5-Fluorouracil (GHASVSINZRGABV-UHFFFAOYSA-N) Acemetacin (FSQKKOOTNAMONP-UHFFFAOYSA-N) 5-Fluoro Cytosine (XRECTZIEBJDKEO-UHFFFAOYSA-N) Acetochlor (VTNQPKFIQCLBDU-UHFFFAOYSA-N)