An Alternative Method to Screen for Pepper Spray Residue

    Volume 48, Issue 1 (January 2003)

    ISSN: 0022-1198


    Published Online: 1 January 2003

    Page Count: 5

    De Forest, PR
    City University of New York,

    Kubic, TA
    City University of New York,

    Gillis, TD
    Santa Clara County District Attorney's Crime Lab,

    (Received 6 September 2002; accepted 24 August 2002)


    A method was developed to screen for pepper spray residue using instruments and methods other than those techniques commonly employed to analyze chemical residue (i.e., gas chromatography mass spectrometry-GCMS or liquid chromatography mass spectrometry-LCMS). The method employed gas chromatography (GC), thin layer chromatography (TLC), and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) to screen for dried pepper spray stains. Pepper sprays from nine different manufacturers were investigated. Capsaicin and dihydrocapsaicin were identified and unique IR reflectance spectra are presented. An additional five compounds were presumptively found. Results showed that a particular stain could be characterized as a pepper-based stain.

    Paper ID: JFS2002233

    DOI: 10.1520/JFS2002233

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    Title An Alternative Method to Screen for Pepper Spray Residue
    Symposium , 0000-00-00
    Committee E30