Electrodes Based on Functionalized Carbon Nanotubes as Sensors to Determine Fenitrothion in Apple Tea Samples

Electrodes Based on Functionalized Carbon Nanotubes as Sensors to Determine Fenitrothion in Apple Tea Samples

Author Palazzo, Fernanda Autor UNIFESP Google Scholar
Codognoto, Lucia Autor UNIFESP Google Scholar
Simões, Fabio Ruiz Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract In this work, the quantitative electroanalytical determination of Fenitrothion pesticide was studied using a bare glassy carbon electrode (GCE) modified with functionalized multiwalled carbon nanotubes (MWNTs) and Square Wave Anodic Stripping Voltammetry (SWASV). the method to modify the GCE electrode surface with the MWNTs was optimized to avoid the contamination by the pesticide adsorption. Infusions of apple tea samples were spiked with the pesticide and analyzed by the standard addition method using the GCE/MWNT electrode. the obtained Limits of Detection (LD) and Quantification (LQ) were 7.30 x 10(-7) mol L-1 and 2.40 x 10(-6) mol L-1, respectively. the recovery values were between 96.0 and 104%. the results confirmed the method suitability to the determination of fenitrothion in commercial apple tea samples with the increase of the detection limits and avoiding irreversible contamination of the electrode surface by the pesticide.
Keywords Modified Electrodes
Functionalized Multiwalled Carbon Nanotubes
Anodic Stripping Square Wave Voltammetry
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Grant number FAPESP: 2010/16031-4
Date 2013-12-01
Published in Sensor Letters. Valencia: Amer Scientific Publishers, v. 11, n. 12, p. 2310-2314, 2013.
ISSN 1546-198X (Sherpa/Romeo, impact factor)
Publisher Amer Scientific Publishers
Extent 2310-2314
Origin http://dx.doi.org/10.1166/sl.2013.3074
Access rights Closed access
Type Article
Web of Science ID WOS:000338910300017
URI http://repositorio.unifesp.br/handle/11600/37066

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