title: Derivative spectrophotometry in the analysis of mixtures of phenols and herbicides.
abstract: Derivative spectrophotometry (zero-crossing technique) was applied to the determination of selected phenols and herbicides in two-component mixtures. Methyl- and chlorophenols (3-methylphenol, 2,3- and 3,4-dimethylphenol, 2,5-, 2,6- and 3,4-dichlorophenol and 2,4,5-trichlorophenol) and triazine, uracil and urea herbicides (simazine, propazine, hexazinone, bromacil and metoxuron) were examined. The RSD values ranged between 0.05 and 4% and the recoveries obtained were between 97 and 110%. The developed derivative spectrophotometric method was also applied as a complementary technique for the separation of overlapping peaks of sample compounds obtained by HPLC with diode-array detection. Metoxuron and 3-methylphenol, metoxuron and 2,5-dichlorophenol and simazine and 2,6-dichlorophenol were determined simultaneously by this method at the level of 1 x 10(-3) g l-1.
authors.affiliation: Department of Analytical and General Chemistry, Silesian Technical University, M. Strzody 7, 44-100 Gliwice, Poland.
authors.forename: I
authors.initials: I
authors.lastname: Baranowska
authors.forename: C
authors.initials: C
authors.lastname: Pieszko
mesh_terms: D004785:Environmental Pollutants / Q000032:analysis*; D006540:Herbicides / Q000032:analysis*; D010636:Phenols / Q000032:analysis*; D013053:Spectrophotometry / Q000379:methods
chemical_list: D004785:Environmental Pollutants; D006540:Herbicides; D010636:Phenols