Determination of a variety of chemical classes of pesticides in surface and ground waters by off-line solid-phase extraction, gas chromatography with electron-capture and nitrogen-phosphorus detection, and high-performance liquid chromatography with post-column derivatization and fluorescence detection.
Octadecyl (C18)-bonded porous silica was evaluated for the extraction of triazines, organochlorine, carbamates and acidic pesticides from surface and ground water. Gas chromatography with selected detection methods (electron-capture detection, nitrogen-phosphorus detection, mass spectrometry) and liquid chromatography-post-column derivatization fluorescence detection was employed for the determination of 32 pesticides. Recoveries varied from 52 to 102%. The recoveries of triazines obtained using C18 extraction cartridges and conventional liquid-liquid extraction (LLE) are compared. The limit of detection for seventeen organochlorine compounds was better than 0.003 microgram/l and the limit of detection for other 15 analytes was better than 0.06 microgram/l. The proposed analytical methodology was applied to analyze pesticides in surface and ground-water samples of the Lassithi Plateau, Crete, Greece.
Vassilakis
I
I
University of Athens, Department of Chemistry, Greece.
Tsipi
D
D
Scoullos
M
M
D002849:Chromatography, Gas / Q000379:methods*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004784:Environmental Monitoring; D006115:Greece; D006540:Herbicides / Q000032:analysis; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D014227:Triazines; D014867:Water / Q000032:analysis*
D006540:Herbicides; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D010573:Pesticide Residues; D014227:Triazines; D014867:Water