Keywords: Chemcatcher pharmaceutical monitoring accumulation Substances: carbamazepine (FFGPTBGBLSHEPO-UHFFFAOYSA-N) diuron (XMTQQYYKAHVGBJ-UHFFFAOYSA-N) clarithromycin (AGOYDEPGAOXOCK-KCBOHYOISA-N) 2.4-D (OVSKIKFHRZPJSS-UHFFFAOYSA-N)