DEtermination of trace levels of diazinon and propetamphos in water and sewage by solid phase extraction

L. Villarosa, M. J. McCormick, P. D. Carpenter, P. J. Marriott

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An analytical method is described for the determination of the organophosphorus pesticides diazinon and propetamphos in water and in sewage, at levels ranging from 0.01-1.0 mg/L. The method involves solid phase extraction using C-18 Bond Elut cartridges, elution with ether, and solvent change to hexane. Quantification of the pesticide is by temperature programmed capillary gas chromatography using a nitrogen—phosphorus detector. Recoveries of diazinon are between 98-102% from water and between 70-80% from activated sludge biomass. These results are compared with a more polar organophosphate, propetamphos, for which the recovery from both water and biomass is close to 100%.

Original languageEnglish
Pages (from-to)93-103
Number of pages11
JournalInternational Journal of Environmental Analytical Chemistry
Issue number2
Publication statusPublished - 1 Jan 1994
Externally publishedYes


  • Diazinon
  • gas chromatography with nitrogen-phosphorus detection
  • mass balance
  • organophosphate pesticide
  • propetamphos
  • sewage
  • solid-phase extraction
  • water

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