Gun shot residue Flashcards
1
Q
what is gun shot residue
A
particles or residues discharged from a firearm after the trigger has been pulled
2
Q
at close range
A
dyes used to stain
overall pattern just as helpful as chemical components
3
Q
at long range
A
not present after more than a few metres from point of shot
is present on bullet
4
Q
Greiss test
A
suggests presence of nitrile components
=> turns brown/ orange
5
Q
Sodium Rhodizonate test
A
suggests presence of lead
=> gives red pink stain
6
Q
conclusive test for inorganic residues
A
SEM-EDX
XRF
AAS and AES
7
Q
conclusive tests for organic compounds
A
FTIR
Raman
GC-MS
8
Q
Primer compositions: Mercuric
A
Mercury Fulminate
Barium nitrate
antimony sulphide
