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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Voltammetric sensing of fenitrothion in natural water and orange juice samples using a single-walled carbon nanohorns and zein modified sensor

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Author(s):
Itkes, Marina P. M. [1] ; de Oliveira, Geiser G. [2] ; Silva, Tiago Almeida [3, 4] ; Fatibello-Filho, Orlando [3] ; Janegitz, Bruno C. [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Dept Nat Sci Math & Educ, BR-13600970 Araras, SP - Brazil
[2] Fed Univ Tocantis, BR-77402970 Gurupi, TO - Brazil
[3] Univ Fed Sao Carlos, Dept Chem, BR-13565970 Sao Carlos, SP - Brazil
[4] Fed Ctr Technol Educ Minas Gerais, Dept Met & Chem, BR-35180008 Timoteo, MG - Brazil
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 840, p. 21-26, MAY 1 2019.
Web of Science Citations: 1
Abstract

A glassy carbon electrode (GCE) modified with single-walled carbon nanohorns (SWCNH) and zein (ZE), a prolamin type-protein fmd in maize, for the differential pulse adsorptive cathodic stripping voltammetric determination of fenitrothion (FT) is proposed. The proposed film was characterized by scanning electron microscopy, cyclic voltammetry and electrochemical impedance spectroscopy. Regarding the electrochemical characterization, comparing the results obtained by cyclic voltammetry and electrochemical impedance spectroscopy, the modified electrode (SWCNH-ZE/GCE) showed an electroactive surface area 3 times higher and faster electron transfer kinetic than bare GCE. By using differential pulse adsorptive cathodic stripping voltammetry and SWCNH-ZE/GCE the analytical curve exhibited a linear response ranging of 9.9 x 10(-7) to 1.2 x 10(-5) mol L-1, with a limit of detection of 1.2 x 10(-8) mol L-1. The proposed sensor was successfully applied for the determination of FT pesticide in natural water and orange juice samples. Moreover, the electrochemical sensor showed good repeatability and reproducibility arising from the excellent film stability, suggesting that the proposed architecture has broad potential for applications in sensing and biosensing. (AU)

FAPESP's process: 17/24618-4 - Determination of Fenitrothion in environmental samples using a glassy carbon electrode modified with single-wall carbon nanohorns and zein
Grantee:Marina Paes Machado Itkes
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 11/13312-5 - Development and application of carbon and nanoparticles base electrodes for the determination of species of interest in different matrices
Grantee:Orlando Fatibello Filho
Support type: Regular Research Grants
FAPESP's process: 17/21898-6 - New conductive devices for application in electrochemical sensing and biosensing
Grantee:Bruno Campos Janegitz
Support type: Regular Research Grants