A New Indirect Electrochemical Method for Determination of Ozone in Water Using Multiwalled Carbon Nanotubes
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Data
2011-06-01
Autores
Cesarino, Ivana
Moraes, Fernando C.
Machado, Sergio A. S.
PassarettiFilho, Juliano [UNESP]
Cardoso, Arnaldo Alves [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Wiley-Blackwell
Resumo
A new electrochemical methodology has been developed for the detection of ozone using multiwalled carbon nanotubes (MWCNT). The method presented here is based on the reaction of ozone with indigo blue dye producing anthranilic acid (ATN). The electrochemical profile of ATN on an electrode of glassy carbon (GC) modified with MWCNT showed an oxidation peak potential at 750 mV vs. Ag/AgCl. An analytical method was developed using differential pulse voltammetry (DPV) to determine ATN in a range of 50-400 nmol L(-1), with a detection limit of 9.7 nmol L(-1). Ozonated water samples were successfully analyzed by GC/MWCNT electrode and the recovery procedure yielded values between of 96.5 and 102.3%.
Descrição
Palavras-chave
Anthranilic acid, Multiwalled carbon nanotubes, Ozone
Como citar
Electroanalysis. Malden: Wiley-blackwell, v. 23, n. 6, p. 1512-1517, 2011.