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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.)

Sensitive determination of carbendazim in orange juice by electrode modified with hybrid material

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Author(s):
Razzino, Claudia A. [1] ; Sgobbi, Livia F. [1] ; Canevari, Thiago C. [1] ; Cancino, Juliana [2] ; Machado, Sergio A. S. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Food Chemistry; v. 170, p. 360-365, MAR 1 2015.
Web of Science Citations: 33
Abstract

This paper describes the application of a glassy carbon electrode modified with a thin film of mesoporous silica/multiwalled carbon nanotubes for voltammetric determination of the fungicide carbendazim (CBZ). The hybrid material, (SiO2/MWCNT), was obtained by a sol-gel process using HF as the catalyst. The amperometric response to CBZ was measured at +0.73 V vs. Ag/AgCl by square wave voltammetry at pH 8.0. SiO2/MWCNT/GCE responded to CBZ in the linear range from 0.2 to 4.0 mu mol L-1. The calculated detection limit was 0.056 mu mol L-1, obtained using statistical methods. The SiO2/MWCNT/GCE sensor presented as the main characteristics high sensitivity, low detection limit and robustness, allowing CBZ determination in untreated real samples. In addition, this strategy afforded remarkable selectivity for CBZ against ascorbic and citric acid which are the main compounds of the orange juice. The excellent sensitivity and selectivity yielded feasible application for CBZ detection in orange juice sample. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/08750-6 - Development of a disposable mimetic biosensor for organophosphorous and carbamate pesticides for the quality control of water supply
Grantee:Lívia Flório Sgobbi
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 11/23047-7 - Development of an electrochemical biosensor based on mesoporous silicon containing carbon nanotubes obtained by a sol-gel process. Electrochemical determination of pesticides.
Grantee:Thiago da Cruz Canevari
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 11/10231-4 - Monitoring of water supply contamination using electrochemical sensors based in aligned carbon nanotubes: part 1: endocrine disruptors
Grantee:Sergio Antonio Spinola Machado
Support type: Regular Research Grants