Variables: concentration Keywords: monitoring pesticide Substances: metolachlor (WVQBLGZPHOPPFO-UHFFFAOYSA-N) clarithromycin (AGOYDEPGAOXOCK-KCBOHYOISA-N) carbendazim (TWFZGCMQGLPBSX-UHFFFAOYSA-N) mecoprop (WNTGYJSOUMFZEP-UHFFFAOYSA-N) carbamazepine (FFGPTBGBLSHEPO-UHFFFAOYSA-N) terbutryn (IROINLKCQGIITA-UHFFFAOYSA-N)