Portable forensic tools
Rapid, on-site forensic analysis of explosive residues at crime scenes would help track down and prosecute offenders. Yet the diverse nature of bomb residues creates numerous problems, keeping the on-site detection concept unready for practical application. The EU-funded ROSFEN (Rapid on-site forensic analysis of explosives and narcotics) project developed a universal chemical sensor suitable for the intended forensic use. The platform was sensitive, selective and rapid, enabling trace amounts to be quickly analysed and without excessive risk of false-positives. The new technologies combined with best-practice protocols to preserve the chain of evidence. Project outcomes included development of novel receptor molecules. The molecules absorb specific explosive compounds, enabling concentration prior to analysis. Additionally, the team demonstrated the selective binding of explosive substances being measured, which strongly agreed with modelled predictions. ROSFEN developed a compact system based on novel ion filtering. The system incorporated all necessary components and modules, including a graphical user interface. A miniaturised solid state quadruple mass-spectrometer detector identified test compounds and interfering substances. The system achieved detection at very low concentrations for various classes of explosives, thereby achieving a major project goal. Researchers successfully demonstrated the prototype platform to several European police forces and forensic laboratories. The ROSFEN project achieved a functioning prototype system; the unit proved the concept of on-site explosives-residue detection, and is ready for further commercialisation development. Such devices will lead to speedy forensic evidence-collection.
Keywords
On-site, forensic, analysis, explosive, residues
