Determination of N-Acetylcysteine by Cyclic Voltammetry Using Modified Carbon Paste Electrode with Copper Nitroprusside Adsorbed on the 3-Aminopropylsilica
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Data
2011-09-01
Autores
de Sa, Acelino Cardoso [UNESP]
Paim, Leonardo L. [UNESP]
Bicalho, Urquisa de Oliveira
do Carmo, Devaney Ribeiro [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Electrochemical Science Group
Resumo
Copper nitroprusside was formed on aminopropylsilica silica gel (3-AS) surface (SiCuNP) previously prepared following two steps. These materials were thoroughly characterized by Infrared (FTIR) and cyclic voltammetry. The above techniques confirmed the successful formation of the copper nitroprusside on the silica surface. The cyclic voltammogram of CuNPSD were found to exhibit two redox couples with (E(theta)')(1) = 0.34 V; (E(theta)')(2) = 0.76 V vs. Ag/AgCl, KCl((sat)) (KCl = 1.0 mol L(-1); v = 20 mV s(-1)) attributed to the redox processes Cu((I))/Cu((II)) and Fe((II))(CN)(5)NO/Fe((III))(CN)(5)NO respectively. The second redox process ((E(theta)') 2 presented by the graphite paste electrode with SiCuNP shows electrocatalytic activity for the oxidation of N-acetylcysteine. The linear range for the determination of N-acetylcysteine was found between 9.9 x 10(-5) and 8.9 x 10(-4) mol L(-1) showing a detection limit of 4.18 x 10(-5) mol L(-1) and an amperometric sensitivity of 3.02 x 10(-2) A /mol(-1) L.
Descrição
Palavras-chave
3-aminopropylsilica Copper, Nitroprusside, Spectroscopy Cyclic Voltammetry, Carbon Paste Electrode, N-aceltylcysteine
Como citar
International Journal of Electrochemical Science. Belgrade: Electrochemical Science Group, v. 6, n. 9, p. 3754-3767, 2011.