What test can be used to chemically identify gunshot residue?

3 The Griess/Modified Griess Test is a chemical test specific for the detection of nitrite deposits (unburned or partially burned gunpowder deposited around suspected bullet holes).

What test is the first chemical test performed to determine if gunshot residue is present?

The “melted paraffin test” was the first test to be used. Melted wax was poured onto a suspect’s hands and allowed to harden. The wax cast was removed and sprayed with a chemical solution to detect gun shot residue1. The gunpowder used in bullets is primarily single-based smokeless powder made of nitrocellulose (NC).

How do investigators test for GSR?

Law enforcement investigators test the clothing and skin of people for gunshot residue to determine if they were near a gun when it discharged. Gunshot residue can travel over 3–5 feet (0.9–1.5 meters) from the gun. At the farthest distance, only a few trace particles may be present.

Is smokeless powder the same as black powder?

First, smokeless powder is about three times as powerful as black powder, which extends its range and allows for small caliber ammo. Smokeless powder should never be used in firearms designed for black powder, especially muzzle loaders. Even a small amount of smokeless powder can destroy a gun.

How does GSR testing work?

Gun shot residue is tested by lifting samples off a defendant’s hands or clothing and then testing to see if the lifts contain a fused particle of barium, antimony, and lead, which are known to be present in GSR. The GSR particles could have been washed away or the Defendant could have been wearing gloves.

How is gunshot residue testing?

Gun shot residue is tested by lifting samples off a defendant’s hands or clothing and then testing to see if the lifts contain a fused particle of barium, antimony, and lead, which are known to be present in GSR.