Substances: 2-6-Dichlorobenzamide (JHSPCUHPSIUQRB-UHFFFAOYSA-N) 5-Hydroxy Diclofenac (VNQURRWYKFZKJZ-UHFFFAOYSA-N) Acetochlor (VTNQPKFIQCLBDU-UHFFFAOYSA-N) Keywords: monitoring