Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/2953
Título: Electrochemical study of butylate: application to the analysis of water
Autor: Barroso, M. Fátima
Ramalhosa, Maria João
Delerue-Matos, Cristina
Sales, M. Goreti F.
Palavras-chave: Butylate
Glassy carbon electrode
Hanging mercury drop electrode
Data: 2008
Editora: Taylor & Francis
Relatório da Série N.º: International Journal of Environmental Analytical Chemistry; Vol. 88, Issue 14
Resumo: The electroactivity of butylate (BTL) is studied by cyclic voltammetry (CV) and square wave voltammetry (SWV) at a glassy carbon electrode (GCE) and a hanging mercury drop electrode (HMDE). Britton–Robinson buffer solutions of pH 1.9–11.5 are used as supporting electrolyte. CV voltammograms using GCE show a single anodic peak regarding the oxidation of BTL at +1.7V versus AgCl/ Ag, an irreversible process controlled by diffusion. Using a HMDE, a single cathodic peak is observed, at 1.0V versus AgCl/Ag. The reduction of BTL is irreversible and controlled by adsorption. Mechanism proposals are presented for these redox transformations. Optimisation is carried out univaryingly. Linearity ranges were 0.10–0.50 mmol L-1 and 2.0–9.0 µmolL-1 for anodic and cathodic peaks, respectively. The proposed method is applied to the determination of BTL in waters. Analytical results compare well with those obtained by an HPLC method.
Peer review: yes
URI: http://hdl.handle.net/10400.22/2953
ISSN: 0306–7319
Versão do Editor: http://www.tandfonline.com/doi/full/10.1080/03067310802474905#.U6BGIkqUXoQ
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