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Orientador(es)
Resumo(s)
Nitrophenol (4-NP) in aqueous solutions with concentration in the range 0.0495-118.8 mg L-1 was developed and validated under the typical criteria for in-house pre-validations. Accordingly, linearity was demonstrated through the Fisher’s exact probability test. Accuracy and precision were then assessed in three concentration levels over the linear range.
The reproducibility of the catalytic wet peroxide oxidation (CWPO) of 4-NP was evaluated together with the analytical error of 4-NP determination in independent experiments. In this case, the sum of both contributions to error never reached 3%.
Two multi-component HPLC methods were also developed for the determination of possible aromatic intermediates (hydroquinone, 1,4-benzoquinone, catechol, 4-nitrocatechol and phenol) and carboxylic acids (oxalic, formic, malic, malonic, acetic and maleic acids) resulting from the 4-NP degradation. The combination of these analytical methods already led to the proposal of an oxidation/mineralization mechanism for the CWPO of 4-NP.
Descrição
Palavras-chave
High-performance liquid chromatography (HPLC) Catalytic wet peroxide oxidation (CWPO) 4-Nitrophenol
Contexto Educativo
Citação
Ribeiro, Rui; Silva, Adrián; Gomes, Helder; Faria, Joaquim (2015). High-performance liquid chromatography as a tool for the assessment of catalytic wet peroxide oxidation processes: in-house pre-validation of three analytical methods. U. Porto Journal of Engineering. 1, p. 50-66