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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of N-Acetylcysteine by Cyclic Voltammetry Using Modified Carbon Paste Electrode with Copper Nitroprusside Adsorbed on the 3-Aminopropylsilica

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de Sa, Acelino Cardoso [1] ; Paim, Leonardo L. [2] ; Bicalho, Urquisa de Oliveira ; do Carmo, Devaney Ribeiro [1]
Total Authors: 4
[1] Univ Estadual Paulista, Fac Engn Ilha Solteira UNESP, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP - Brazil
[2] Univ Estadual Paulista, Inst Quim Araraquara UNESP, BR-14801970 Araraquara, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: International Journal of Electrochemical Science; v. 6, n. 9, p. 3754-3767, SEP 2011.
Web of Science Citations: 10

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. (AU)

FAPESP's process: 07/07700-7 - Development of sensors based on modified electrodes with pentacyanonitrosylferrates for determination of sulphur components in natural gas
Grantee:Leonardo Lataro Paim
Support type: Scholarships in Brazil - Doctorate