Variables: concentration Keywords: monitoring pesticide Substances: clarithromycin (AGOYDEPGAOXOCK-KCBOHYOISA-N) carbendazim (TWFZGCMQGLPBSX-UHFFFAOYSA-N) benzotriazole (QRUDEWIWKLJBPS-UHFFFAOYSA-N) mecoprop (WNTGYJSOUMFZEP-UHFFFAOYSA-N)