Publicação: Determination of 2,4-D and dicamba in food crops by MEKC
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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.
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Dicamba and 2,4-D, Food Crops, Micellar Electrokinetic Chromatography, Supercritical Fluid Extraction, 2,4 dichlorophenoxyacetic acid, acetone, carbon dioxide, dicamba, magnesium trisilicate, pesticide, capillary electrophoresis, corn, crop, food, micellar electrokinetic chromatography, nonhuman, priority journal, rice, supercritical fluid extraction
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Inglês
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Chromatographia, v. 50, n. 1-2, p. 35-40, 1999.
