Chromatographia

, Volume 50, Issue 1–2, pp 35–40 | Cite as

Determination of 2,4-D and Dicamba in food crops by MEKC

  • F. M. Lanças
  • S. R. Rissato
  • M. S. Galhiane
Originals

Summary

The determination of 2,4-D (2,4-dichlorophenoxyacetic acid) and Dicamba (2-methoxy-3,6-dichlorobenzoic acid) residues in sugar cane, rice and corn was performed by a supercritical fluid extraction (SFE) method using CO2/acetone as extraction mix and an SFE apparatus developed in our laboratory. The extracts were cleaned up after extraction by both liquid-liquid partition and a Florisil column. Micellar electrokinetic capillary chromatography (MEKC) coupled with ultraviolet on-column detection was used for the analysis of these pesticides. The detection limits were improved by the preparation of a special detection cell with an increased pathlength that gave detection limits of ca. 0.6 pg for 2,4-D and Dicamba. Our results demonstrated that capillary electrophoresis can be a powerful new analytical tool for pesticide residue analysis.

Key Words

Micellar Electrokinetic Chromatography Supercritical Fluid Extraction Dicamba and 2,4-D Food Crops 

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Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1999

Authors and Affiliations

  • F. M. Lanças
    • 1
  • S. R. Rissato
    • 1
  • M. S. Galhiane
    • 2
  1. 1.Institute of Chemistry of Šao CarlosUniversity of Šao PauloŠao CarlosBrazil
  2. 2.Paulista State University, UNESPBauruBrazil

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