Voltammetric determination of sulfite using graphite paste electrode modified with nanoparticles of copper pentacyanonitrosylferrate
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
01/12/2012
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Resumo |
Copper Pentacyanonitrosylferrate (NCuNP) nanoparticles were prepared in formamide solvent. The material was characterized by Infrared (FTIR), X-Ray Diffraction (XRD) and Ultraviolet-Visible (UV-Vis) Spectroscopy. The Cyclic Voltammogram (CV) the modified graphite paste electrode with NCuNP exhibits two redox couples with (Eθ,)1 = 0.29 and (E θ,)2 = 0.86 V attribute at Cu(I)/Cu (II) and Fe(II)(CN)5NO/Fe(III)(CN) 5NO processes, respectively (KCl = 1.0 mol L-1; v = 20 mV s-1). The redox couple with (Eθ,)2 presents an electrocatalytic response for sulfite. The modified graphite paste electrode gives a linear response of 7.0 × 10-4 to 3.0 × 10-2 mol L-1 (r = 0.998), for sulfite determination with Detection Limit (DL) of 1.76 × 10-3 mol L-1 and an amperometric sensitivity of 3.38 mA/mol L-1 and relative standard desviations ± 3% (n=3). ©The Electrochemical Society. |
Formato |
217-224 |
Identificador |
http://dx.doi.org/10.1149/1.4704961 ECS Transactions, v. 43, n. 1, p. 217-224, 2012. 1938-5862 1938-6737 http://hdl.handle.net/11449/73848 10.1149/1.4704961 2-s2.0-84879453937 |
Idioma(s) |
eng |
Relação |
ECS Transactions |
Direitos |
closedAccess |
Palavras-Chave | #Amperometric #Cyclic voltammograms #Detection limits #Electrocatalytic response #Graphite paste electrode #Linear response #Modified graphites #Voltammetric determination #Copper #Fourier transform infrared spectroscopy #Nanoparticles #X ray diffraction #Graphite |
Tipo |
info:eu-repo/semantics/conferencePaper |