Real-time electrochemical determination of phenolic compounds after benzene oxidation

Autor(es)

Cesarino, Ivana ^[1] ; Moraes, Fernando C. ^[1] ; Ferreira, Tanare C. R. ^[1] ; Lanza, Marcos R. V. ^[1] ; Machado, Sergio A. S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 672, p. 34-39, MAY 1 2012.
• Citações Web of Science: 17

Resumo

A sensitive electrochemical sensor was successfully developed on multi-walled carbon nanotubes (MWCNT) and cobalt phthalocyanine (CoPc) modified glassy carbon electrode (GC), and used to detect byproducts formed after the electrolysis of benzene. The GC/MWCNT/CoPc electrode was applied in the detection of phenolic compounds using square wave voltammetry (SWV). The proposed sensor exhibited a sequence in the sensitivity of the tested phenols: catechol > hydroquinone > resorcinol > phenol and 1,4-benzoquinone. The detection limits for individual phenols were also calculated: catechol (15.62 mu g L-1), hydroquinone (17.91 mu g L-1), resorcinol (46.12 mu g L-1), phenol (58.83 mu g L-1) and 1,4-benzoquinone (13.75 mu g L-1). The proposed sensor was successfully applied in the determination of the total amount of phenols formed after the benzene oxidation, and the obtained results were in full agreement with those from the HPLC procedure. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 10/11049-2 - Desenvolvimento e aplicação de sensores eletroquímicos baseados em nanotubos de carbono alinhados para a detecção de interferentes endócrinos em amostras ambientais
• Beneficiário: Fernando Cruz de Moraes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 10/11567-3 - Análise in situ dos subprodutos formados na degradação eletroquímica de hidrocarbonetos monoaromáticos
• Beneficiário: Ivana Cesarino
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado