Page 4: Guidelines for Canadian Drinking Water Quality: Guideline Technical Document – Chlorpyrifos
Analytical Methods and Treatment Technology
Organophosphorus insecticides in water may be analysed by extraction separately into hexane and dichloromethane, separation by gas chromatography and flame thermionic or flame photometric detection (detection limit 1 µg/L);Footnote 15 separation may also be accomplished by gas/liquid chromatography, followed by flame photometric detection (detection limit 0.1 µg/L).Footnote 16
No information was found on the effectiveness of current treatment technologies in removing chlorpyrifos from drinking water.
Date reviewed: 2026-06-04