A Methodology Based on NMR Spectroscopy for the Forensic Analysis of Condoms

    Volume 46, Issue 4 (July 2001)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Page Count: 14


    Lee, GSH
    University of St. Andrews, Fife, KY

    Brinch, KM
    Materials and Forensic Science, University of Technology, Sydney, Broadway, NSW

    Kannangara, K
    Materials and Forensic Science, University of Technology, Sydney, Broadway, NSW

    Wilson, MA
    Materials and Forensic Science, University of Technology, Sydney, Broadway, NSW

    Dawson, M
    Materials and Forensic Science, University of Technology, Sydney, Broadway, NSW

    (Received 20 March 2000; accepted 1 August 2000)

    Abstract

    Both solution and solid state Nuclear Magnetic Resonance (NMR) spectroscopic techniques have been used to determine differences in commercially available condoms. Whilst solid state NMR is useful for determining the polymer backbone, it is not useful for forensic analysis due to the commonality of the latex condom. However solution NMR spectra obtained following a simple extraction procedure using hexane, provides a fingerprint of the additives in the lubricants. Following the development of a flow chart, basing decisions on the presence of particular peaks present in the solution spectra, 33 of 38 condoms could be individualized. Samples were also analyzed after having the lubricant manually removed and soaking the condom in water for 3 to 24 h. These experiments were performed to simulate a case of the sample having been used and disposed of by flushing down the toilet, as may be experienced in a case of a sexual assault. The results indicated that the only significant water soluble component was polyethylene glycol. The overall results suggest that the method developed may be a quick and useful technique in characterizing condoms. The information obtained can be used to provide associative evidence between suspect and crime, and so be useful in sexual assault cases.


    Paper ID: JFS15052J

    DOI: 10.1520/JFS15052J

    ASTM International
    is a member of CrossRef.

    Author
    Title A Methodology Based on NMR Spectroscopy for the Forensic Analysis of Condoms
    Symposium , 0000-00-00
    Committee E30