The surface of boron-doped diamond (BDD) electrode has been modified by Nafion®. The polymer film was applied by solvent evaporation on BDD electrode surface. Nafion®-BDD electrode is used as a sensor for the detection of dopamine (DA) in acidic and neutral media. Favourable ionic interaction between the Nafion® film and DA enhances the current response compared to that at the bare electrode. In cyclic voltammetric measurements, Nafion®-BDD electrode can successfully separate the oxidation/reduction DA peaks in both media, but an evident increase in the response was obtained in acidic media. In preliminary experiments with differential-pulse voltammetry, the sensitivity of the Nafion®-BDD electrode for DA was higher and it permits the calculation of the range detection with this technique. The modified electrode exhibits a stable and sensitive response to DA. The results are described and discussed in the light of the existing literature.

Electrochemical behavior of dopamine at Nafion®-modified boron doped diamond electrode: preliminary results

MARTINEZ, Carlos Alberto;FERRO, Sergio;DE BATTISTI, Achille;
2007

Abstract

The surface of boron-doped diamond (BDD) electrode has been modified by Nafion®. The polymer film was applied by solvent evaporation on BDD electrode surface. Nafion®-BDD electrode is used as a sensor for the detection of dopamine (DA) in acidic and neutral media. Favourable ionic interaction between the Nafion® film and DA enhances the current response compared to that at the bare electrode. In cyclic voltammetric measurements, Nafion®-BDD electrode can successfully separate the oxidation/reduction DA peaks in both media, but an evident increase in the response was obtained in acidic media. In preliminary experiments with differential-pulse voltammetry, the sensitivity of the Nafion®-BDD electrode for DA was higher and it permits the calculation of the range detection with this technique. The modified electrode exhibits a stable and sensitive response to DA. The results are described and discussed in the light of the existing literature.
2007
Martinez, Carlos Alberto; M., Cerro; Ferro, Sergio; DE BATTISTI, Achille; M. A., Quiroz
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/529604
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