DERIVATIVE SPECTROPHOTOMETRY IN THE ANALYSIS OF BROMACIL AND METOXURON IN THE PRESENCE OF SIMAZINE OR PROPAZINE AND HEXAZINONE

ABSTRACT

The method for the determination of propazine, simazine, bromacil, hexazinone and metoxuron by zero order and derivative spectrophotometry has been worked out. In the three-component mixtures it was possible to analyse metoxuron and bromacil in the presence of simazine or propazine and hexazinone applying the first order derivative spectra (zero-crossing technique). Detection was at 298.0 nm and 310.0 nm for bromacil and metoxuron, respectively. Calibration graphs were linear from 1 to 50 mg/l for bromacil and 1 to 30 mg/l for metoxuron. Recoveries were 98–120% for water; the RSD (n = 5) were 0.6–4.9%. For soil, recoveries were 90–130% and the RSD (n = 5) were 1.5–14.8%.

Keywords:

• Spectrophotometry
• Derivative spectrophotometry
• Herbicides

Acknowledgments