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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.)

Study of Electrochemical Oxidation and Quantification of the Pesticide Pirimicarb Using a Boron-Doped Diamond Electrode

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Author(s):
Guimaraes Selva, Thiago Matheus ; de Araujo, William Reis ; Bacil, Raphael Prata ; Longo Cesar Paixao, Thiago Regis
Total Authors: 4
Document type: Journal article
Source: Electrochimica Acta; v. 246, p. 588-596, AUG 20 2017.
Web of Science Citations: 9
Abstract

An electrochemical study of the carbamate pesticide pirimicarb (PMC), which acts on the central nervous system, was performed using a boron-doped diamond working electrode. Cyclic, differential pulse, and square-wave voltammetry experiments across a wide pH range (2.0 to 8.0) showed three irreversible oxidation processes in the voltammetric behavior of PMC. The two first processes were pH-dependent, while the third was not. The three oxidation process were independent of each other, and each involved the transfer of one electron. A reaction proposal for the electrochemical oxidation of PMC is shown, and it is supported by mass spectrometry experiments. After this, an analytical method for PMC quantification in water samples by differential pulse (DP) voltammetry is proposed. The optimal DP voltammetric parameters (step potential, amplitude potential, and scan rate) were optimized using experimental design, and an analytical curve was obtained from 2.0 to 219 mu mol L (1) with an estimated detection limit of 1.24 mu mol L (1). The accuracy of the proposed method was evaluated by the addition and recovery method, with recoveries ranging from 88.6 to 96.3%. Some highlights of the proposed analytical method are its simplicity, reliability, and portability. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 16/16477-9 - Fabrication of portable paper-based analytical devices with electrochemical and colorimetric detection system aiming at forensic, clinical, and environmental applications
Grantee:William Reis de Araujo
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 12/06642-1 - Formation and properties of adducts of organic hydroxy-compounds with carbonate in aqueous medium and biological conditions
Grantee:Claudimir Lucio Do Lago
Support Opportunities: Regular Research Grants