Fluorescence Detection of Ethyl Centralite in Gunshot Residues

    Volume 39, Issue 5 (September 1994)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Page Count: 12


    Caddy, B
    Ph.D. Student and Professor/Director, Forensic Science Unit, University of Strathclyde, Glasgow,

    Meng, H-H
    Ph.D. Student and Professor/Director, Forensic Science Unit, University of Strathclyde, Glasgow,

    (Received 8 July 1993; accepted 2 February 1994)

    Abstract

    A fluorescence method has been developed to detect ethyl centralite in gunshot residues. Residues were recovered from shooters' hands with cotton wool swabs. The swabs were extracted by a syringe elution procedure and the extracts cleared by TLC. The cleaned samples were hydrolyzed in phosphoric acid at 178 °C for 20 min to yield N-ethylaniline. Any N-ethylaniline was dansylated directly on a TLC plate, which was then developed two-dimensionally. The fluorescent dansyl-N-ethylaniline spot was scraped off and extracted for fluorometric determination. The detection limits for ethyl centralite standards and spiked hand samples are 1 ng and 5 ng respectively. Three out of six test firings of a .38 revolver gave extracts that were found to contain ethyl centralite. One of these was swabbed 180 min after firing three rounds of ammunition.


    Paper ID: JFS13707J

    DOI: 10.1520/JFS13707J

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    Author
    Title Fluorescence Detection of Ethyl Centralite in Gunshot Residues
    Symposium , 0000-00-00
    Committee E30