Surface-sampling and analysis of TATP by swabbing and gas chromatography/mass spectrometry

Détails

ID Serval
serval:BIB_41C6700229BC
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Surface-sampling and analysis of TATP by swabbing and gas chromatography/mass spectrometry
Périodique
Forensic Science International
Auteur(s)
Romolo F., Cassioli L., Grossi S., Cinelli G., Russo M.
ISSN
1872-6283
ISSN-L
0379-0738
Statut éditorial
Publié
Date de publication
01/2013
Peer-reviewed
Oui
Volume
224
Numéro
1-3
Pages
96-100
Langue
anglais
Résumé
The method of sample recovery for trace detection and identification of explosives plays a critical role in several criminal investigations. After bombing, there can be difficulties in sending big objects to a laboratory for analysis. Traces can also be searched for on large surfaces, on hands of suspects or on surfaces where the explosive was placed during preparatory phases (e.g. places where an IED was assembled, vehicles used for transportation, etc.).
In this work, triacetone triperoxide (TATP) was synthesized from commercial precursors following reported methods. Several portions of about 6 mg of TATP were then spread on different surfaces (e.g. floors, tables, etc.) or used in handling tests. Three different swabbing systems were used: a commercial swab, pre-wetted with propan-2-ol (isopropanol) and water (7:3), dry paper swabs, and cotton swabs wetted with propan-2-ol. Paper and commercial swabs were also used to sample a metal plate, where a small charge of about 4 g of TATP was detonated. Swabs were sealed in small glass jars with screw caps and Parafilm® M and sent to the laboratory for analysis. Swabs were extracted and analysed several weeks later by gas chromatography/mass spectrometry. All the three systems gave positive results, but wetted swabs collected higher amounts of TATP. The developed procedure showed its suitability for use in real cases, allowing TATP detection in several simulations, including a situation in which people wash their hands after handling the explosive.
Mots-clé
Improvised explosives, TATP, Sampling, Swabbing, Forensic chemistry, Gas chromatography, Mass spectrometry
Création de la notice
14/01/2013 9:46
Dernière modification de la notice
03/03/2018 16:34
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