Analysis and design of a multisensory array for explosive substances based on solid electrodes

Baron, Mark and Barrett, Richard and Gonzalez-Rodriguez, Jose (2012) Analysis and design of a multisensory array for explosive substances based on solid electrodes. In: Optical Materials and Biomaterials in Security and Defence Systems Technology IX, 26-27 September 2012, Edinburgh.

Full content URL: http://dx.doi.org/10.1117/12.973692

Full text not available from this repository.

Item Type:Conference or Workshop contribution (Paper)
Item Status:Live Archive

Abstract

The detection of explosives and explosive related compounds is a subject of importance in several areas including environmental health, de-mining efforts (land and sea) and security and defence against terrorist activity. The use of electrochemical methods is particularly attractive as many common explosives contain suitable chemical groups to be detected using electrochemical methods. The electrochemical detection of explosives and related compounds in solution using a virtual metal electrode array and differential pulse voltammetry was achieved. The multiple sets of voltammetric data were integrated using multivariate analysis and matched with known substances present in explosives. Seven explosive substances: 2,4-initrotoluene, 2,6-dinitrotoluene, 3,4-dinitrotoluene, 2-nitrotoluene, octogen (HMX), pentaerithrytol tetranitrate (PETN), trinitrotoluene (TNT) and cyclonite (RDX) and a taggant agent 2,3â� dimethylâ� 2,3â� dinitrobutane (DMNB) were subjected to analysis using four solid electrodes, namely glassy carbon, silver, gold and platinum in saline aqueous solutions to mimic an aquatic environment. The results obtained in Differential Pulse Voltammetry (DPV) from the different experiments with each electrode were combined to produce a single voltammogram, which was subjected to chemometric analysis using Partial Least Squares (PLS) and Principle Component Analysis Non-Iterative Partial Least Squares (PCA-NIPALS). A combination of the electrochemical signals obtained together with the use of chemometric analysis made it possible to discriminate between explosives and their mixtures and also to quantitate their concentration in saline solutions. These combinations created a mathematical array, which clearly separates the explosives, even if the electrochemical information is buried or mixed with the electrode background noise. © 2012 SPIE.

Additional Information:Conference Code:96353
Keywords:Chemometrics, Differential pulse voltammetry, ELectrochemical detection, Explosive-related compounds, Partial least square (PLS), PCA, PLS, Principle component analysis, Biological materials, Electrochemical electrodes, Electrochemistry, Explosives detection, Iterative methods, Optical materials, Principal component analysis, Voltammetry, Explosives
Subjects:F Physical Sciences > F360 Optical Physics
Divisions:College of Science > School of Life Sciences
Related URLs:
ID Code:10560
Deposited On:20 Dec 2013 10:17

Repository Staff Only: item control page