Variables: concentration Keywords: monitoring Substances: clarithromycin (AGOYDEPGAOXOCK-KCBOHYOISA-N) diuron (XMTQQYYKAHVGBJ-UHFFFAOYSA-N) carbendazim (TWFZGCMQGLPBSX-UHFFFAOYSA-N) fipronil (ZOCSXAVNDGMNBV-UHFFFAOYSA-N) terbutryn (IROINLKCQGIITA-UHFFFAOYSA-N)