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gun discharge residueJoe Segen2016-12-15T23:28:00+00:00
gun discharge residue
Definition A self-explanatory term for traces of metals–barium, antimony and lead from the primer of the cartridge (“shell”) which may be found on the back of the firing hand of the person discharging a firearm.
Retrieval Cotton swabs moistened with 10% hydrochloric acid or 5% nitric acid recover residues for analysis by flameless atomic absorption spectrometry (FAAS) and neutron activation analysis (NAA). Adhesive material is used to recover residues for analysis by scanning electron microscopy and EDAX.
Synonym Gunshot discharge residue