Analysis of trifluralin and other dinitroaniline herbicide residues by zero-order and derivative ultraviolet spectrophotometry.
The utility of zero-order and first- and second-derivative ultraviolet (UV) spectrophotometry for the identification of benfluralin, trifluralin, isopropalin and oryzalin is discussed. These four herbicides were determined by zero-order and first-derivative UV spectrophotometry, with linear calibration graphs established between 50 and 100 concentration units and limits of detection ranging from 1 to 7 micrograms ml-1. The application of these techniques to the residue analysis of fortified soils and niebe and peanut leaves is described. Trifluralin residues were found to be 6.7, 8 and 1.7 micrograms ml-1 in samples of fortified soils, niebe leaves and peanut leaves, respectively. Isopropalin residues were found to range from 62 to 154 micrograms ml-1 in samples of fortified niebe leaves.
Traore
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Aaron
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D000814:Aniline Compounds / Q000032:analysis; D004136:Dinitrobenzenes / Q000032:analysis; D006540:Herbicides / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D010944:Plants / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D013424:Sulfanilamides; D014052:Toluidines / Q000032:analysis*; D014274:Trifluralin / Q000032:analysis*
D000814:Aniline Compounds; D004136:Dinitrobenzenes; D006540:Herbicides; D010573:Pesticide Residues; D012989:Soil Pollutants; D013424:Sulfanilamides; D014052:Toluidines; C005947:benefin; C008200:isopropalin; C012465:oryzalin; D014274:Trifluralin