Chromatographia

, Volume 37, Issue 5–6, pp 303–312 | Cite as

Multi-residue procedure for the analysis of pesticides in groundwater: Application to samples from the comunidad Valenciana, Spain

  • F. Hernández
  • I. Morell
  • J. Beltrán
  • F. J. López
Originals

Summary

A simple multi-residue procedure has been developed and applied to the analysis of pesticides in groundwater samples from the Comunidad Valenciana, a predominantly agricultural area on the Mediterranean coast of Spain. The procedure includes a liquid-liquid extraction, after addition of NaCl on the samples, and a subsequent analysis by capillary gas chromatography using a dual detection system with electron capture and nitrogen-phosphorous detectors. This allows the determination of more than 30 compounds (organophosphorous, organochlorine and pyrethroid pesticides) at the low ppb (μg l−1) levels. Detection limits obtained varied between 0.01 μg l−1 (lindane, fonofos) and 0.5 μg l−1 (cypermethrin). An additional injection of the sample extracts into a gas chromatograph equipped with a column of different polarity and electron capture detector is used for the confirmation of chromatographic peaks. The recommended procedure has been applied to 66 ground water samples. Pesticides, including organophosphorus and organochlorine compounds were detected in 31 of them, in levels ranging from 0.02 to 0.7 μg l−1.

Key Words

Gas chromatography Pesticides in groundwater Solvent extraction Multiresidue analysis Selective detection 

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Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1993

Authors and Affiliations

  • F. Hernández
    • 1
  • I. Morell
    • 1
  • J. Beltrán
    • 1
  • F. J. López
    • 1
  1. 1.Environmental and Natural Resources Laboratory, Department Experimental SciencesUniversity Jaume ICastellónSpain

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