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Carbon and diamond paste microelectrodes based on Mn(III) porphyrins

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: S.Balasoiu, R.I.VanStaden, J.F.VanStaden, S.Pruteanu, G.L.Radu

Editorial: Elsevier, Analytica Chimica Acta, 668, p.201-207, 2010.

Rezumat:

Three Mn(III) porphyrins were used for the design of carbon paste and diamond paste based microelectrodes, which were employed for the determination of dopamine in pharmaceutical and biological samples using differential pulse voltammetry (DPV). The limits of detection lie between 1.6×10−13 and 2.0×10−6 mol L−1 while the sensitivities were between 230 pAmol L−1 and 3.24Amol L−1. Dopamine was recovered reliable from pharmaceutical and biological samples in percentages higher than 91.00% and 92.00%, respectively. The surface of the microelectrodes can easily be renewed by simple polishing, obtaining a fresh surface ready for use in a new assay.

Cuvinte cheie: Porfirina MnIII, Dopamina, Pasta de carbon, Microelectrod // Mn(III) porphyrin, Dopamine, Carbon paste, Microelectrode

URL: http://doi:10.1016/j.aca.2010.04.025