Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/2232

TitleEffect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures
Author(s)Bento, M. Fátima
Geraldo, M. Dulce
Montenegro, M. I.
KeywordsMicroelectrodes
Diffusion coefficient
Viscosity
Migration
Issue dateApr-1999
PublisherElsevier
JournalAnalytica Chimica Acta
Citation"Analytica chimica acta". 385 (1999) 365-371.
Abstract(s)Steady state voltammetric currents of both neutral and charged species obtained at microelectrodes are affected by the medium composition. Experiments carried out in N,N-dimethylformamide (DMF) and toluene/DMF mixtures for the reduction of diciano(fluoren-9-ylidene)methane and the methylviologen cation and for the oxidation of ferrocene, in the presence of different electrolyte concentrations indicate that both viscosity of the solution and mass transport by migration may have a strong effect on the measured limiting currents. These observations are particularly important in electroanalysis since the appropriate choice of the medium may substantially improve both the sensitivity and the detection limits of the electrochemical method.
TypeArticle
URIhttp://hdl.handle.net/1822/2232
DOI10.1016/S0003-2670(98)00698-9
ISSN0003-2670
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CDQuim - Artigos (Papers)

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