Electrooxidation and determination of dopamine using a Nafion (R)-cobalt hexacyanoferrate film modified electrode

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorCastro, Suely S. L.
dc.creatorMortimer, Roger J.
dc.creatorde Oliveira, Marcelo F.
dc.creatorStradiotto, Nelson Ramos
dc.date2014-05-20T15:33:54Z
dc.date2016-10-25T18:10:33Z
dc.date2014-05-20T15:33:54Z
dc.date2016-10-25T18:10:33Z
dc.date2008-03-01
dc.date.accessioned2017-04-06T00:35:06Z
dc.date.available2017-04-06T00:35:06Z
dc.identifierSensors. Basel: Molecular Diversity Preservation Int, v. 8, n. 3, p. 1950-1959, 2008.
dc.identifier1424-8220
dc.identifierhttp://hdl.handle.net/11449/42352
dc.identifierhttp://acervodigital.unesp.br/handle/11449/42352
dc.identifier10.3390/s8031950
dc.identifierWOS:000254340700035
dc.identifierWOS000254340700035.pdf
dc.identifierhttp://dx.doi.org/10.3390/s8031950
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/885004
dc.descriptionThe electrocatalysis of dopamine has been studied using a cobalt hexacyanoferrate film (CoHCFe)-modified glassy carbon electrode. Using a rotating disk CoHCFe-modified electrode, the reaction rate constant for dopamine was found to be 3.5 x 105 cm(3) mol(-1) s(-1) at a concentration of 5.0 x 10(-5) mol L-1. When a Nafion (R) film is applied to the CoHCFe-modified electrode surface a high selectivity for the determination of dopamine over ascorbic acid was obtained. The analytical curve for dopamine presented linear dependence over the concentration range from 1.2 x 10(-5) to 5.0 x 10(-4) mol L-1 with a slope of 23.5 mA mol(-1) L and a linear correlation coefficient of 0.999. The detection limit of this method was 8.9 x 10(-6) mol L-1 and the relative standard deviation for five measurements of 2.5 x 10(-4) mol L-1 dopamine was 0.58%.
dc.languageeng
dc.publisherMolecular Diversity Preservation Int
dc.relationSensors
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectcobalt hexacyanoferrate
dc.subjectchemically modified electrode
dc.subjectdopamine
dc.subjectvoltammetry
dc.subjectrotating disk electrode
dc.titleElectrooxidation and determination of dopamine using a Nafion (R)-cobalt hexacyanoferrate film modified electrode
dc.typeOtro


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