Discrimination of new and aged post-blast explosives residues

Helena Hansson; Anders Elfving; Dennis Menning; Hans G. Önnerud; Erik Holmgren; Mona Brantlind; Ulla Hedebrant; Henric Östmark; Rose-Marie Karlsson; Patrick Goede

doi:10.1117/12.898183

19 October 2011 Discrimination of new and aged post-blast explosives residues

Helena Hansson, Anders Elfving, Dennis Menning, Hans G. Önnerud, Erik Holmgren, Mona Brantlind, Ulla Hedebrant, Henric Östmark, Rose-Marie Karlsson, Patrick Goede

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Proceedings Volume 8189, Optics and Photonics for Counterterrorism and Crime Fighting VII; Optical Materials in Defence Systems Technology VIII; and Quantum-Physics-based Information Security; 818903 (2011) https://doi.org/10.1117/12.898183
Event: SPIE Security + Defence, 2011, Prague, Czech Republic

Abstract

The main objective of this project is to study the difference between aged and un-aged post-blast residues and nonblasted explosives. Sand from the post-blast scenes was subjected to accelerated aging (temperature, light and addition of water) over a period of 20 weeks. The samples were aged as matrix-free pure compounds and as post-blast sand. Several explosive materials were detonated over sand-filled containers and selected residues were separated and detected with HPLC/UV. Separation and detection methods using GC/MS and LC/UV were developed. This screening study of aged post-blast residues revealed that most of the residues reached low or undetectable concentration within a period of eight weeks of aging. This degradation rate theory can be applied both for the temperature- and UV-aged samples. The half-life degradation time (t_1/2) was estimated and most of the detected residues reach t_1/2 within five weeks. No trends with significant difference can be seen between the UV- and temperature-aged samples.

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Helena Hansson, Anders Elfving, Dennis Menning, Hans G. Önnerud, Erik Holmgren, Mona Brantlind, Ulla Hedebrant, Henric Östmark, Rose-Marie Karlsson, and Patrick Goede "Discrimination of new and aged post-blast explosives residues", Proc. SPIE 8189, Optics and Photonics for Counterterrorism and Crime Fighting VII; Optical Materials in Defence Systems Technology VIII; and Quantum-Physics-based Information Security, 818903 (19 October 2011); https://doi.org/10.1117/12.898183

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