Variables: concentration Keywords: monitoring polar organic pollutant Substances: terbutryn (IROINLKCQGIITA-UHFFFAOYSA-N) carbamazepine (FFGPTBGBLSHEPO-UHFFFAOYSA-N) 2.4-D (OVSKIKFHRZPJSS-UHFFFAOYSA-N) fipronil (ZOCSXAVNDGMNBV-UHFFFAOYSA-N) mecoprop (WNTGYJSOUMFZEP-UHFFFAOYSA-N) diazinon (FHIVAFMUCKRCQO-UHFFFAOYSA-N) diclofenac (DCOPUUMXTXDBNB-UHFFFAOYSA-N)