Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/12348
Título: High-performance liquid chromatography as a tool to evaluate the performance of the catalytic wet peroxide oxidation of 4-nitrophenol: pre-validation of analytical methods
Autor: Ribeiro, Rui
Silva, Adrián
Gomes, Helder
Faria, Joaquim
Palavras-chave: High-performance liquid chromatography (HPLC)
Catalytic wet peroxide oxidation (CWPO)
4-Nitrophenol
Data: 2015
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
Resumo: 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.
Peer review: yes
URI: http://hdl.handle.net/10198/12348
Aparece nas colecções:DTQB - Artigos em Revistas Não Indexados ao ISI/Scopus

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