UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Sampling of explosive residues: the use of a gelatine-based medium for the recovery of ammonium nitrate

Amaral, MA; Yasin, S; Gibson, AP; Morgan, RM; (2020) Sampling of explosive residues: the use of a gelatine-based medium for the recovery of ammonium nitrate. Science & Justice , 60 (6) pp. 531-537. 10.1016/j.scijus.2020.07.007. Green open access

[thumbnail of Sampling of explosive residues_finalversion.pdf]
Preview
Text
Sampling of explosive residues_finalversion.pdf - Accepted version

Download (497kB) | Preview

Abstract

Forensic scientists must be able to recover traces of any original explosive materials not consumed in the detonation, in a careful controlled manner to aid a crime reconstruction. In current sampling techniques, the collection efficiency of post-blast residue is highly variable and often dependent on the swabbing materials and solvent systems used. To address these method limitations, this study presents a gelatine-based sampling medium and assesses its capabilities for the collection of ammonium nitrate. Common surfaces were spotted with a known concentration of ammonium nitrate, the unset gel applied, allowed to set, and then peeled from the surface. The gel was dissolved, and solid phase extraction employed to isolate the target explosive compound and remove the constituents of the gel. The eluate was concentrated and subsequently analysed and quantified. Overall, the gel formulation was able to collect ammonium nitrate from all of the test surfaces, with recoveries ranging from 0.1% to 61.7%. This study presents a gelatine-based formulation that has the potential to become a valuable asset in the forensic tool kit for the collection of explosive traces. A key attribute of the gel is that it offers an alternative recovery tool to conventional swabbing and solvent extraction methods.

Type: Article
Title: Sampling of explosive residues: the use of a gelatine-based medium for the recovery of ammonium nitrate
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.scijus.2020.07.007
Publisher version: http://dx.doi.org/10.1016/j.scijus.2020.07.007
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Post-blast analysis, Trace evidence, Evidence recovery, Gelatine
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Security and Crime Science
URI: https://discovery.ucl.ac.uk/id/eprint/10106605
Downloads since deposit
18Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item