Classification and Identification of Ignitable Liquids in Fire Debris

Abstract

Researchers at the University of Central Florida, in conjunction with the National Center for Forensic Science (NCFS), have developed a summed ion approach to analyzing GC-MS data of ignitable liquids. The invention is useful for forensic science, counter-terrorism, medical diagnostics and manufacturing quality control.

Gas Chromatography coupled with Mass Spectrometry (GC-MS) is an extremely useful tool in forensic analysis. In the case of a fire, the scientist may need to determine if the fire was accidental or intentional. In the case of an explosion, the scientist needs to identify explosive materials that were the cause, in order to assist law enforcement in identifying the individual or group responsible. Tracing the identity of flammables, accelerants, and explosives are often complicated by other burned contaminants such as carpeting, foam padding and building materials. Comparison of a total ion chromatogram of a sample to the suspected ignitable liquid can be undermined by the presence of residues from these contaminants.

Technical Details

This method uses software that can rapidly search through a database/library of summed ion spectra for commercially available ignitable liquids and match it to the residue left behind in a suspected arson. The software also takes into account the presence of known or experimentally determined pyrolysis components (contaminants).

Benefit

Market Application

Publications

Ignitable Liquid Classification and Identification Using the Summed-Ion Mass Spectrum/ Instrumentation Science & Technology, 2008, 36, 375-393