Determination of Barium in forensic samples by atomic absorption spectrophotometer

Determination of Barium (Ba) is very important in forensic samples especially in gunshot residue for identification of the shooter in a gunshot case. A simple and fast method of determination of Barium (Ba) by Atomic Absorption Spectrophotometer has many advantages over other methods in terms of reliability and accuracy of results. Even to some extent the result obtained is comparable with that of more sophisticated instrumental methods like Neutron Activation Analysis (NAA). Swabs can be taken from hands with a suitable acid such as Hydrochloric Acid (HCl) or Nitric Acid (HNO₃) and the sample solution can be aspirated into the flame of an Atomic Absorption Spectrophotometer for determination of Barium (Ba) content.