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

Autor(es)

Palazzo, Fernanda ^[1] ; Codognoto, Lucia ^[1] ; Simoes, Fabio Ruiz ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, UNIFESP, Inst Environm Chem & Pharmaceut Sci, BR-09972270 Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Sensor Letters; v. 11, n. 12, p. 2310-2314, DEC 2013.
• Citações Web of Science: 6

Resumo

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. (AU)

• Processo FAPESP: 10/16031-4 - Desenvolvimento de eletrodos baseados em compósitos de nanotubos de carbono, polímeros condutores e nanopartículas de ouro
• Beneficiário: Fabio Ruiz Simões
• Modalidade de apoio: Auxílio à Pesquisa - Regular