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Sensors 2018, 18(1), 139; https://doi.org/10.3390/s18010139

Study of the Weathering Process of Gasoline by eNose

1
Department of Analytical Chemistry, Faculty of Sciences, IVAGRO, University of Cadiz, Puerto Real, Cadiz P.O. Box 40 11510, Spain
2
Department of Physical Chemistry, Faculty of Sciences, University of Cadiz, Puerto Real, Cadiz P.O. Box 40 11510, Spain
*
Author to whom correspondence should be addressed.
Received: 21 December 2017 / Revised: 2 January 2018 / Accepted: 3 January 2018 / Published: 5 January 2018
(This article belongs to the Section Chemical Sensors)
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Abstract

In a fire investigation the rapid detection of the presence of ignitable liquids like gasoline is of great importance as it allows appropriate treatment of the remains, the identification of prevention methods and detects the possible presence of an arsonist. In some cases, analysts cannot access the fire scene in the first few hours due to the dangers involved in the situation and, as a consequence, phenomena such as weathering start. Ignitable liquid weathering is an evaporation process that results in an increase in the abundance of non-volatile compounds relative to volatile compounds, and this process changes the chemical composition. In the present work, the weathering of samples of gasoline at different times (from 0 h to a month) has been studied using an electronic nose (eNose). The influence of the volume used (40 µL and 80 µL) and the type of support (cork, wood, paper and cotton sheet) has been studied. Chemometric tools have been used with the aim of ascertaining the weathering time for which the developed method is capable of detecting the presence of gasoline. The eNose was able to discriminate samples of weathered gasoline. The support used for the samples did not seem to have an influence on the detection and the system. View Full-Text
Keywords: arson; characterization; chemometrics; eNose; evaporation; fingerprints; fire investigation; gasoline; ignitable liquids; weathering arson; characterization; chemometrics; eNose; evaporation; fingerprints; fire investigation; gasoline; ignitable liquids; weathering
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Aliaño-González, M.J.; Ferreiro-González, M.; Barbero, G.F.; Ayuso, J.; Palma, M.; Barroso, C.G. Study of the Weathering Process of Gasoline by eNose. Sensors 2018, 18, 139.

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