Determination of diflubenzuron residues by thin-layer chromatography

A method using liquid chromatography with diode-array detection, LC-DAD, has been developed for the determination of the pesticide diflubenzuron and some of its major metabolites, such as 2,6-difluorobenzamide, 4-chlorophenylurea, and 4-chloroaniline in pine-needles. Samples were extracted into acetonitrile and further cleaned-up through aminopropyl cartridge. LC was performed on a CI8 column using acetonitrilemethanol-water (50:2:48) as mobile phase at 1 mL min-' at room temperature. 1857 Copyright 0 1998 by Marcel Dekker, Inc Downloaded by [University of Auckland Library] at 11:55 03 November 2014 1858 RODRIGUEZ ET AL.The detection limits were lower than 0.6 ng mL-' in all cases, except for 2,6-diflurobenzamide that was 9.4 ng mL-'. Recoveries of the compounds from supplied pine-needle samples were higher than 83% with a relative standard deviation lower than 2.6%.

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Determination of diflubenzuron residues by thin-layer chromatography

Cited by 3 publications

References 8 publications

Thin-layer chromatographic methods for use in pesticide residue analysis

Thin-layer chromatographic methods for use in pesticide residue analysis

Determination of diflubenzuron residues in water by solid-phase extraction and quantitative high-performance thin-layer chromatography

HPLC/Diode-Array Method for the Determination of the Pesticide Diflubenzuron and Its Major Metabolites 2,6-Difluorobenzamide, 4-Chlorophenylurea, and 4-Chloroaniline in Forestry Matrices

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