Voltammetric studies of titanium (IV) phosphate modified with copper hexacyanoferrate and electroanalytical determination of N-acetylcysteine

Autor(es)

Favaro Pipi, Angelo Ricardo ^[1] ; do Carmo, Devaney Ribeiro ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Dept Fis & Quim, Fac Engn Ilha Solteira UNESP, BR-15385000 Ilha Solteira, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Electrochemistry; v. 41, n. 7, p. 787-793, JUL 2011.
• Citações Web of Science: 10

Resumo

Titanium (IV) Phosphate copper hexacyanoferrate composite (TiPhCuHCF) was prepared using a new methodology for the synthesis. A preliminary characterization of the precursor and resulting materials was defined using spectroscopic and chemical techniques. The cyclic voltammogram of the modified electrode containing TiPhCuHCF exhibited two redox couples. The first and second redox couples present a formal potential (E(theta')) of 0.18 and 0.76 V and were ascribed to the Cu(+/)Cu(2+) (E(theta'))(1) and Fe(2+)(CN)(6)/Fe(3+)(CN)(6) (E(theta'))(2) processes, respectively. In a preliminary study, the peak located at 0.76 V displays a sensitive response to N-acetylcysteine. The modified graphite paste electrode showed a linear range from 1.0 x 10(-5) to 7.0 x 10(-4) mol L(-1) for the determination of N-acetylcysteine with a limit detection of 6.96 x 10(-5) mol L(-1) and relative standard deviation of +/- 5% (n = 3) and amperometric sensitivity of 24.79 x 10(-3) A mol L(-1). The modified electrode was electrochemically stable and showed good reproducibility. (AU)

• Processo FAPESP: 03/12882-6 - Dendrímeros de silsesquioxanos e octaamino poli(propileno) imina modificados com triclorotriazina: síntese, caracterização e aplicações
• Beneficiário: Devaney Ribeiro Do Carmo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 07/57678-8 - Potencialidades analíticas de Ti(IV) em materiais meso e macro porosos
• Beneficiário: Angelo Ricardo Fávaro Pipi
• Modalidade de apoio: Bolsas no Brasil - Mestrado