FREQUENCYOF OCCURRENCE OF CERTAIN CHEMICAL CLASSES OF GSR FROM VARIOUS AMMUNITION TYPES

ABSTRACT: The subject of the presented study were thirteen samples of primer residues originating from six types of ammunition, collected from shooters ’ hands immediately after shooting. The entire area of adhesive tabs with the secured mate-rial was examined with the use of SEM-EDX method in the automatic manner. Fre-quencies of occurrence of particles assigned to various chemical classes were calculated for each of the shooting experiment performed. In order to find out what kind of mutual relationships would reveal samples of gunshot residues collected from various types of ammunition as well as from the same type of ammunition clus-ter analysis was applied. The performed cluster analysis showed a promising ten-dency of grouping ammunitions according to their types. Moreover, it was checked that a sample of GSR from Makarov 9 mm ammunition, with some chemical classes weakly represented, may be correctly classified into the appropriate group of sam-ples of GSR originating from this ammunition