APPLICATION OF X-RAY FLUORESCENCE ANALYSIS FOR FORENSIC SCIENCE IN MONGOLIA
Аннотация
In this work, we have studied the possibility of evaluating the elemental composition of automotive coating paints and determining the gunshot residue from 5.6 mm bullets of a small-caliber gun using the EDXRF technique. An Elvax EDXRF spectrometer, consisting of a Si-PIN detector with a resolution of 200 eV for MnKα radiation with energy of 5.9 keV and a mini X-ray tube with Rh anode, was used. Results of the study showed that the number of shots was directly correlated to the relative intensity of Barium and Lead on the gunshot target, and the distance of the shooting could be determined using chemical elements intensities, such as Pb, S, Ba and Cu intensities, from the gunshot residue. In the case of automotive paints, the elements identified in the samples were Ca, Ti, Fe, Cu, Cl, Zn, Cr and Pb, and the EDXRF technique could be used for the identification of the different cars by the paint coating samples from the crashed car. This work was the first study which used the EDXRF analysis for automotive paints in Mongolia.
Key words: XRF, application in the forensic science, gunshot residue, automotive paint
DOI: 10.15826/analitika.2017.21.4.005
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