The sampling of ignitable liquids on suspects' hands

Détails

ID Serval
serval:BIB_9176DD7F1084
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The sampling of ignitable liquids on suspects' hands
Périodique
Forensic Science International
Auteur(s)
Montani I., Comment S., Delémont O.
ISSN
0379-0738
Statut éditorial
Publié
Date de publication
01/2010
Peer-reviewed
Oui
Volume
194
Numéro
1-3
Pages
115-124
Langue
anglais
Résumé
In arson cases, the collection and detection of traces of ignitable liquids on a suspect's hands can provide information to a forensic investigation. Police forces currently lack a simple, robust, efficient and reliable solution to perform this type of swabbing.
In this article, we describe a study undertaken to develop a procedure for the collection of ignitable liquid residues on the hands of arson suspects. Sixteen different collection supports were considered and their applicability for the collection of gasoline traces present on hands and their subsequent analysis in a laboratory was evaluated. Background contamination, consisting of volatiles emanating from the collection supports, and collection efficiencies of the different sampling materials were assessed by passive headspace extraction with an activated charcoal strip (DFLEX device) followed by gas chromatography-mass spectrometry (GC-MS) analysis. After statistical treatment of the results, non-powdered latex gloves were retained as the most suitable method of sampling.
On the basis of the obtained results, a prototype sampling kit was designed and tested. This kit is made of a three compartment multilayer bag enclosed in a sealed metal can and containing three pairs of non-powdered latex gloves: one to be worn by the sampler, one consisting of a blank sample and the last one to be worn by the person suspected to have been in contact with ignitable liquids. The design of the kit was developed to be efficient in preventing external and cross-contaminations.
Mots-clé
Arson, Flammable liquid, Gasoline, Swab, Gloves, Transfer, Hands,
Création de la notice
23/02/2010 9:47
Dernière modification de la notice
03/03/2018 19:28
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