Detection and discrimination of organophosphorus pesticides in water by using a colorimetric probe array

• A colorimetric probe array for detection and discrimination of organophosphorus pesticides in water has been developed.
• A clear discrimination was observed for malathion, leptophos, dichlorvos, dibrom and diazinon.
• The array was able to detect and predict concentration of diazinon in leaves from orange trees.

Detection and discrimination of several organophosphorus pesticides in water using a colorimetric probe array containing twelve dyes has been achieved. A clear discrimination for malathion, leptophos, dichlorvos, dibrom and diazinon was observed. The array was used to determine the concentration of diazinon in orange leaves.