A carregar...
Publicação
Electrochemical oxidation of propanil and related N-substituted amides
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 378.76 KB | Adobe PDF |
Orientador(es)
Resumo(s)
The electrochemical behaviour of propanil and related N-substituted amides (acetanilide and N,N-diphenylacetamide) was
studied by cyclic and square wave voltammetry using a glassy carbon electrode. Propanil has been found to have chemical
stability under the established analytical conditions and showed an oxidation peak at +1.27V versus Ag/AgCl at pH 7.5.
N,N-diphenylacetamide has a higher oxidation potential than the other compounds of +1.49V versus Ag/AgCl. Acetanilide
oxidation occurred at a potential similar to that of propanil, +1.24V versus Ag/AgCl. These results are in agreement with
the substitution pattern of the nitrogen atom of the amide. A degradation product of propanil, 3,4-dichloroaniline (DCA), was
also studied, and showed an oxidation peak at +0.66V versus Ag/AgCl. A simple and specific quantitative electroanalytical
method is described for the analysis of propanil in commercial products that contain propanil as the active ingredient, used in
the treatment of rice crops in Portugal.
Descrição
Palavras-chave
Propanil Anilide herbicides Square wave voltammetry N-substituted amides
Contexto Educativo
Citação
Editora
Elsevier