TY  - JOUR
PY  - 2015//
TI  - Study of acidified ignitable liquid residues in fire debris by solid-phase microextraction with gas chromatography and mass spectrometry
JO  - Journal of Separation Science
A1  - Martín-Alberca, Carlos
A1  - Garcia-Ruiz, Carmen
A1  - Delémont, Olivier
SP  - ePub
EP  - ePub
VL  - ePub
IS  - ePub
N2  - The detection and identification of ignitable liquid residues in fire debris can be meaningful in fire investigations. However, background pyrolysis products and weathering hinder the identification and classification steps. In addition to those processes, the acidification of the ignitable liquids before the combustion process could make those tasks even more difficult. Nevertheless, there are no systematic studies assessing the extraction, analysis and composition of acidified ignitable liquid residues obtained from fire debris. In this work, a methodology for the study of acidified ignitable liquid residues in fire debris by solid-phase microextraction with gas chromatography and mass spectrometry is proposed. This methodology has been evaluated, first with simulated solutions (gasoline-sulphuric acid mixtures set on fire under controlled conditions), and then with analysis of samples from real fire debris obtained from 18 chemical ignition Molotov cocktails made with sulfuric acid and three different ignitable liquids (two types of gasoline and diesel fuel). In addition, the extensive modifications observed in chromatograms of acidified ignitable liquid residues regarding neat and weathered samples were studied. These alterations were produced by the combustion and acidification processes. As a consequence, tert-butylated compounds are proposed as diagnostic indicators for the identification of acidified gasoline in fire debris, even in strongly weathered samples. This article is protected by copyright. All rights reserved.<p />  <p>Language: en</p>
LA  - en
SN  - 1615-9306
UR  - http://dx.doi.org/10.1002/jssc.201500337
ID  - ref1
ER  -