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Chromatographia

, Volume 55, Issue 11–12, pp 667–671 | Cite as

Determination of simazine and cymoxanil in soils by microwave-assisted solvent extraction and HPLC with reductive amperometrical detection

  • O. López de Sabando
  • Z. Gómez de Balugera
  • M. A. Goicolea
  • E. Rodríguez
  • M. C. Sampedro
  • R. J. Barrio
Originals Column Liquid Chromatography

Summary

A microwave-assisted extraction (MAE) method was optimized for the herbicide simazine and the fungicide cymoxanil in soil samples. The experimental variables that affect MAE, such as temperature, extraction time and solvent volume, were studied. It was concluded that these pesticides could be efficiently extracted from soil samples in a microwave oven with 10 mL of acetonitrile at 90°C for 5 min The analysis of extracts has been carried out by high performance liquid chromatography with amperometric reductive detection (HPLC-ED). The detector, equipped with a hanging mercury drop electrode (HMDE), operated in direct current mode at −1.2 V vs Ag/AgCl, when a mobile phase consisting of phosphate buffer-acetonitrile (95:5, v/v) was used. The procedure developed involving MAE and HPLC-ED provided detectability in soil samples of 30 μg Kg−1, acceptable recoveries (range 82.3–100.3%) and RSDs of lower than 5% for cymoxanil and simazine.

Key Words

Column liquid chromatography Reductive amperometrical detection Microwave-assisted extraction Pesticides Soils 

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Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 2002

Authors and Affiliations

  • O. López de Sabando
    • 1
  • Z. Gómez de Balugera
    • 2
  • M. A. Goicolea
    • 1
  • E. Rodríguez
    • 2
  • M. C. Sampedro
    • 1
  • R. J. Barrio
    • 1
  1. 1.Department of Analytical ChemistryUniversity of Basque CountryVitoria-GasteizSpain
  2. 2.Department of Chemical EngineeringUniversity of Basque CountryVitoria-GasteizSpain

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