No. Gunpowder (smokeless powder) has a different composition than dynamite. BOTH may contain some nitroglycerin, but there the formulas take different paths. However, there IS scientific testing for explosives residue as well as for gunshot residue. Since I work with explosives, this makes air travel and security screening an interesting event for me.
Gun Shot Residue
GSR is the abbreviation for Gun Shot residue. It is a forensic test for materials left on the skin from a close range firearm wound.
Gun Shot Residue
GSR stands for Gun Shot Residue, which is unburnt gunpowder that gets shot out of the gun and gets stuck on whatever is close to the barrell of the gun when shot at close range to an object.
GSR - gunshot residue
Nothing
In forensics, GSR stands for Gun Shot Residue. The trace chemicals that are left on someone after they have fired a gun.
They can test your skin and clothes for the presence of gunpowder residue.
Residue tests can detect gunshot residue on a person's hands, clothing, or skin, indicating recent contact with firearms. Additionally, forensic analysis can link ballistic evidence such as bullet casings or bullets to a specific gun. CCTV footage or eyewitness accounts may also help establish if someone shot a gun at a specific time and place.
A good crime lab might find residue of burned gunpowder on the person or his clothing.
Scanning electron microscope testing
That will depend on the type of gun (revolver versus rifle, etc) how many times it was fired, and what the hands were exposed to after the firing. It is typically measured in days.