Voltammetric studies of anthraquinone dyes adsorbed at a hanging mercury drop electrode using fast pulse techniques

• Tipo: Artigo em Revista Científica Internacional
• Data: 1999

Autores

Almeida, PJ (Autor) FCUP; Rodrigues, JA (Autor) FCUP; Barros, AA (Autor) FCUP; Fogg, AG (Autor) Outra

Revista

Título: Analytica Chimica Acta

Vol. 385

Páginas: 287-293

ISSN: 0003-2670

Editora: Elsevier

Indexação

ISI Web of Knowledge - 15 Citações

Scopus - 14 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-001-4ME

DOI: 10.1016/s0003-2670(98)00586-8

Abstract (EN): Square wave voltammetric studies, involving adsorptive stripping methodology, of anthraquinone-based reactive dyes and of a typical anthraquinone dye Alizarin Red S are reported. The reduction of their anthraquinone moiety is reversible and fast and the sensitivity of these determinations can be improved if current sampling is made earlier after the pulse application. In order to try to modify the rate of the electrochemical process at the electrode, two approaches have been tested: the effect of adding surfactants and the influence of supporting electrolyte concentration. In both cases, a change in the results obtained is observed, owing, in the first case, to the modification of the electrode surface, and, in the second, to the importance of the resistance of the solution.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7