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Stella [2.4K]
3 years ago
10

What is the greiss test? In forensic science?

Social Studies
2 answers:
galben [10]3 years ago
7 0

Answer:

The Griess Test is a test to detect the presence of nitrite residues. Nitrite residues are a by-product of the combustion of smokeless gunpowder.  When a firearm is discharged nitrite particles are expelled from the muzzle of a firearm and can be imbedded in or deposited on the surface of a target.  The Griess Test is the primary test used by firearms examiners to determine a muzzle-to-garment distance.

The Griess Test is performed by first treating a piece of desensitized photographic paper with a chemical mixture of sulfanilic acid in distilled water and alpha-naphthol in methanol.  Desensitized photographic paper is obtained by exposing the paper to a hypo solution.  The photographic paper will no longer be light-sensitive but will be reactive to the presence of nitrite residues.

oee [108]3 years ago
4 0
The Griess test is an analytical chemistry test which defects the presence of nitrite ion in solution. 

Hope this helps if not sorry.
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