For example: When a person goes to the aid of a victim of a gunshot wound, some gunshot residue particles can transfer from the victim.
Since the previous lab tests only examined for the existence of barium, antimony, and business lead, any other element including those elements had the potential to give a phony positive result. Advanced analytical techniques such as ion beam analysis IBAcarried out after scanning electron microscopy, can support further information allowing one to infer about the source of gunshot residue particles.
However, there were disputes over whether or not GSR is a reliable source of research. The gasses so condensate on the surface, go forthing atoms that are composed of the chemicals in the primer.
Oliver et al, References Books 1. Since SEM-EDX allows a individual to look at the size and form of a atom, GSR atoms can be distinguished from other environmental or chemical atoms that may besides look on the tried surfaces. The number and energy of the x-rays emitted from a specimen can be measured by an energy dispersive spectrometer; this gives information direct to the energy difference.