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Determination of Ignitable Liquids in Fire Debris: Direct Analysis by Electronic Nose

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URI: http://hdl.handle.net/10498/20337

DOI: 10.3390/s16050695

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2016-Determination of ignitable liquids in fire debris Direct analysis by electronic nose.pdf (2.540Mb)
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Author/s
Ferreiro González, MartaAuthority UCA; Álvarez, José A.; Fernández Barbero, GerardoAuthority UCA; Palma Lovillo, MiguelAuthority UCA; Ayuso Vilacides, JesúsAuthority UCA; García Barroso, Carmelo
Date
2016-05
Department
Química Analítica; Química Física
Source
Sensors 2016, 16, 695
Abstract
Arsonists usually use an accelerant in order to start or accelerate a fire. The most widely used analytical method to determine the presence of such accelerants consists of a pre-concentration step of the ignitable liquid residues followed by chromatographic analysis. A rapid analytical method based on headspace-mass spectrometry electronic nose (E-Nose) has been developed for the analysis of Ignitable Liquid Residues (ILRs). The working conditions for the E-Nose analytical procedure were optimized by studying different fire debris samples. The optimized experimental variables were related to headspace generation, specifically, incubation temperature and incubation time. The optimal conditions were 115 C and 10 min for these two parameters. Chemometric tools such as hierarchical cluster analysis (HCA) and linear discriminant analysis (LDA) were applied to the MS data (45–200 m/z) to establish the most suitable spectroscopic signals for the discrimination of several ignitable liquids. The optimized method was applied to a set of fire debris samples. In order to simulate post-burn samples several ignitable liquids (gasoline, diesel, citronella, kerosene, paraffin) were used to ignite different substrates (wood, cotton, cork, paper and paperboard). A full discrimination was obtained on using discriminant analysis. This method reported here can be considered as a green technique for fire debris analyses.
Subjects
fire accelerants; discrimination; optimization; E-nose
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  • Artículos Científicos [4821]
  • Artículos Científicos INBIO [264]
  • Articulos Científicos Quim. Ana. [159]
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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
This work is under a Creative Commons License Attribution-NonCommercial-NoDerivatives 4.0 Internacional

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