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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.)

Flow injection analysis of picric acid explosive using a copper electrode as electrochemical detector

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Author(s):
Junqueira, Joao R. C. [1] ; de Araujo, William R. [1] ; Salles, Maiara O. [1] ; Paixao, Thiago R. L. C. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Quim, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Talanta; v. 104, p. 162-168, JAN 30 2013.
Web of Science Citations: 32
Abstract

A simple and fast electrochemical method for quantitative analysis of picric acid explosive (nitro-explosive) based on its electrochemical reduction at copper surfaces is reported. To achieve a higher sample throughput, the electrochemical sensor was adapted in a flow injection system. Under optimal experimental conditions, the peak current response increases linearly with picric acid concentration over the range of 20-300 mu mol L-1. The repeatability of the electrode response in the flow injection analysis (FIA) configuration was evaluated as 3% (n=10), and the detection limit of the method was estimated to be 6.0 mu mol L-1 (S/N=3). The sample throughput under optimised conditions was estimated to be 550 samples h(-1). Peroxide explosives like triacetone triperoxide (TATP) and hexamethylene triperoxide diamine (HMTD) were tested as potential interfering substances for the proposed method, and no significant interference by these explosives was noticed. The proposed method has interesting analytical parameters, environmental applications, and low cost compared with other electroanalytical methods that have been reported for the quantification of picric acid. Additionally, the possibility to develop an in situ device for the detection of picric acid using a disposable sensor was evaluated. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/19903-5 - Development of electroanalytical methods for detection/discrimination of drugs of abuse, its adulterants and explosives in forensic samples
Grantee:William Reis de Araujo
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 12/12106-5 - Development of intelligent devices (electronic noses and tongues) using electrochemical, colorimetric and mass measurements aiming to the discrimination of forensic and food samples
Grantee:Thiago Regis Longo Cesar da Paixão
Support type: Regular Research Grants
FAPESP's process: 11/11115-8 - Development of a hibrid tongue (electrochemistry and colorimetric) aiming the discrimination of forensic samples.
Grantee:Maiara Oliveira Salles
Support type: Scholarships in Brazil - Post-Doctorate