Volume 45, Issue 6 (November 2000)

    Comparing the Additive Composition of Smokeless Gunpowder and Its Handgun-fired Residues

    (Received 28 September 1999; accepted 6 December 1999)

    CODEN: JFSOAD

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    Abstract

    Detecting the use of handguns via the determination of the organic additives in smokeless gunpowder residues (OGSR) presents a promising alternative to primer metal residue analysis. Compositional analysis of the gunpowder additives nitroglycerin, diphenylamine, and ethyl centralite provides information that can associate residue samples with unfired gunpowder. We evaluated the composition of seven reloading smokeless gunpowders, both in bulk and as single particles, by ultrasonic solvent extraction/capillary electrophoresis. Handgun-fired residues obtained from three common weapon calibers loaded with the known reloading powders were compared with the unfired powders. In general, the composition of the residues was similar to that found in the unfired powders. For double-base powders, comparing the ratio of the propellant (P) to the total amount of stabilizer (S) for both residue and gunpowder samples proved to be a useful measurement for identification. This P/S ratio demonstrated that the additives in the residues did not greatly change relative to the unfired powder, providing a useful indicator to aid in forensic powder and residue evaluation.


    Author Information:

    Reardon, MR

    MacCrehan, WA
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaitherburg, MD

    Rowe, WF
    The George Washington University, Washington, DC


    Stock #: JFS14871J

    ISSN: 0022-1198

    DOI: 10.1520/JFS14871J

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    Author
    Title Comparing the Additive Composition of Smokeless Gunpowder and Its Handgun-fired Residues
    Symposium , 0000-00-00
    Committee E30