2011
DOI: 10.1590/s0100-46702011000200010
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Eletrodo de pasta de carbono em minicavidade de contato sólido

Abstract: Este trabalho descreve a preparação de eletrodo de pasta de carbono (EPC) em minicavidade de contato sólido e sua avaliação quando a pasta de carbono contém ou não partículas sub-micormétricas de SiO2(Eu3+ 2%) e SiO2(Eu3+ 2%)-lisina. Nestes estudos, medidas de voltametria cíclica e impedância eletroquímica foram realizadas em PBS (0,1 mol L-1 pH 7,4) contendo as espécies redox Fe(CN)6-3/-4. Os resultados de impedância foram interpretados baseados na reação de transferência de carga envolvendo as espécies Fe(CN… Show more

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Cited by 2 publications
(2 citation statements)
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“…Chloroform was used to homogenize the carbon pastes and was volatilized after a few minutes. After preparation, the paste was packed into a cavity (3 mm diameter, 0.07 cm 2 area) in the body of a Teflon rod, forming the working electrode, in an assembly similar to that described previously (Ferreira et al, 2011). The experiments were performed under stirred conditions, employing a rotating disk system (Model AFMSRX, Pine Instruments) with an interchangeable disk electrode.…”
Section: Electrodesmentioning
confidence: 99%
“…Chloroform was used to homogenize the carbon pastes and was volatilized after a few minutes. After preparation, the paste was packed into a cavity (3 mm diameter, 0.07 cm 2 area) in the body of a Teflon rod, forming the working electrode, in an assembly similar to that described previously (Ferreira et al, 2011). The experiments were performed under stirred conditions, employing a rotating disk system (Model AFMSRX, Pine Instruments) with an interchangeable disk electrode.…”
Section: Electrodesmentioning
confidence: 99%
“…Most importantly this technique enables the in situ monitoring of the species in real time. 45 Electrochemical immunosensors, depending upon the transducer, may be amperometric, 46,47 potentiometric, 48 impedimetric 49 or conductometric. 50 Herein, we restrict our discussions to amperometrictype immunosensors based on screen-printed electrodes (SPEs).…”
Section: Introductionmentioning
confidence: 99%