NCJ Number
70750
Journal
Forensic Science International Volume: 16 Issue: 1 Dated: (July/August 1980) Pages: 53-62
Date Published
1980
Length
10 pages
Annotation
Nondestructive analysis of gunshot residues on hands was studied by anodic stripping voltammetry using a low-cost, home-constructed polarograph.
Abstract
Prior to test firing, the test hand was washed with detergent, followed by four consecutive washes with a washing solution. After test firing, another three or four consecutive washes were performed, rinsing the hand 60 times inside a plastic bag. Using anodic stripping voltammetry, a separate analysis was conducted for antimony. A single analysis was then conducted for zinc, lead, and copper. Allowance was made in the calculations for the incomplete removal of the metallic residues by the limited number of washes. The recovery efficiency was found to depend on the initial quantities and test elements. The amount of metallic elements detected on the firing hand depends on the firearm and ammunition used, the exact discharge conditions, and the sample collecting methods. The results of the tests on zinc and copper cannot be compared due to the lack of data; however, the data on lead and antimony fall within the ranges reported in the literature. Four tables present the data results. A total of 14 references are included.