Preparation and voltammetric studies of titanium (IV) Phosphate modified with silver hexacyanoferrate to a voltammetric determination of L-cysteine
| dc.contributor.author | Cumba, Loanda Raquel [UNESP] | |
| dc.contributor.author | Bicalho, Urquisa de Oliveira [UNESP] | |
| dc.contributor.author | Carmo, Devaney Ribeiro do [UNESP] | |
| dc.contributor.institution | Universidade Estadual Paulista (UNESP) | |
| dc.date.accessioned | 2022-04-29T02:57:50Z | |
| dc.date.available | 2022-04-29T02:57:50Z | |
| dc.date.issued | 2012-07-02 | |
| dc.description.abstract | In this work, a novel Titanium (IV) Phosphate (TiPh) composite was prepared using a easily methodology of the synthesis. A preliminary characterization of the precursor and resulting materials was defined using spectroscopic and voltammetric techniques. As a second step, TiPh was reacted with silver ions (TiPhAg) and subsequent hexacyanoferrate was added (TiPhAgHCF). The electrochemical behaviour of the composite (TiPhAgHCF) was verified by means of a graphite paste electrode using cyclic voltammetry in a potential range of 0.2 to 0.9 V (vs Ag/AgCl). The cyclic voltammogram of the modified electrode containing (TiPhAgHCF) exhibited a single redox couple. The redox couple present a formal potential (E θ') of 0.77 V vs Ag/AgCl (KNO 3 1.0 mol L -1; v = 20 mV s -1) and ascribed to the [Fe II(CN) 6]/[Fe III(CN) 6] processes. In a electroanalytical study, the peak located at 0.77 V present a sensitive response to L-cysteine. The modified graphite paste electrode showed a linear range from 2.0×10 -4 to 9.0×10 -3 mol L -1 for the determination of L-cysteine with a limit detection of 3.34×10 -4 mol L -1 and relative standard deviation of ± 5% (n = 3) and amperometric sensitivity 10.34×10 -3 A mol L -1. The modified electrode was electrochemically stable and showed excellent reproducibility. © 2012 by ESG. | en |
| dc.description.affiliation | Faculdade de Engenharia de Ilha Solteira UNESP - Univ Estadual Paulista Departamento de Física e Química, Av. Brasil Centro, 56 CEP 15385-000, Ilha Solteira | |
| dc.description.affiliationUnesp | Faculdade de Engenharia de Ilha Solteira UNESP - Univ Estadual Paulista Departamento de Física e Química, Av. Brasil Centro, 56 CEP 15385-000, Ilha Solteira | |
| dc.format.extent | 4465-4478 | |
| dc.identifier.citation | International Journal of Electrochemical Science, v. 7, n. 5, p. 4465-4478, 2012. | |
| dc.identifier.issn | 1452-3981 | |
| dc.identifier.scopus | 2-s2.0-84862841164 | |
| dc.identifier.uri | http://hdl.handle.net/11449/226861 | |
| dc.language.iso | eng | |
| dc.relation.ispartof | International Journal of Electrochemical Science | |
| dc.source | Scopus | |
| dc.subject | Cyclic Voltammetry | |
| dc.subject | L-cysteine | |
| dc.subject | Titanium (IV) phosphate | |
| dc.title | Preparation and voltammetric studies of titanium (IV) Phosphate modified with silver hexacyanoferrate to a voltammetric determination of L-cysteine | en |
| dc.type | Artigo |