Spheroidal Propellant Particle
Definition
A smooth, approximately spherical particle of ball-type smokeless powder 50-300 micrometres in diameter, identifiable under SEM by its distinctive morphology. Presence in blast debris indicates smokeless powder was a component of the device.
Related terms
- EGDN (Ethylene Glycol Dinitrate)
- A volatile nitrate ester component of dynamite-type commercial explosives. Its high vapour pressure and long soil migration distance make it a reliable...
- Electron Ionisation (EI)
- The standard ionisation mode in GC-MS, using a 70 eV electron beam in high vacuum to ionise and fragment vapour-phase analytes. Produces...
- Energy-Dispersive XRF (EDXRF)
- An XRF configuration in which characteristic X-rays from all excited elements are detected simultaneously by a silicon drift detector. Used in handheld...
- ENFSI FEL Network
- The European Network of Forensic Science Institutes Forensic Explosives Laboratory Network, linking national forensic explosives laboratories across 18 EU member states. Maintains...
- Selected Reaction Monitoring (SRM)
- A triple-quadrupole LC-MS/MS acquisition mode in which Q1 selects a precursor ion, Q2 fragments it, and Q3 detects a specific product ion....
- SEM-EDX
- Scanning electron microscopy with energy-dispersive X-ray spectroscopy. The electron beam excites characteristic X-rays from each element present in the target grain, giving...
- Split-Sample Protocol
- The practice of dividing a forensic extract into two portions before analysis, one for prosecution analysis and one archived for potential defence...
- Suppressed Conductivity IC
- An ion chromatography detection method in which a membrane suppressor chemically neutralises the background eluent conductivity, leaving only the analyte ions as...
- SWGMAT
- Scientific Working Group for Materials Analysis, a US forensic science standards body (now succeeded by the OSAC Explosives Subcommittee). Published the Forensic...
Explained in
- Laboratory Explosives Analysis: LC-MS, GC-MS, IC, XRF and SEM-EDXA smooth, approximately spherical particle of ball-type smokeless powder 50-300 micrometres in diameter, identifiable under SEM by its distinctive morphology....