A Field Diagnostic Test for the Improvised Explosive Urea Nitrate

    Volume 50, Issue 3 (May 2005)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Published Online: 6 April 2005

    Page Count: 5


    Klein, A
    Casali Institute of Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem,

    Almog, J
    Casali Institute of Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem,

    Abramovich-Bar, S
    Israel Police National HQ, Jerusalem,

    Tamiri, T
    Israel Police National HQ, Jerusalem,

    Shloosh, Y
    Israel Police National HQ, Jerusalem,

    (Received 16 July 2004; accepted 30 November 2004)

    Abstract

    A sensitive, specific and simple color test for the improvised explosive urea nitrate is described. It is based on the formation of a red pigment upon the reaction between urea nitrate and p-dimethylaminocinnamaldehyde (p-DMAC) under neutral conditions. Urea itself, which is the starting material for urea nitrate, does not react with p-DMAC under the same conditions. Other potential sources of false positive response e.g., common fertilizers, medications containing the urea moiety and various amines, do not produce the red pigment with p-DMAC. Exhibits collected from 10 terrorist cases have been tested with p-DMAC. The results were in full agreement with those obtained by instrumental techniques including GC/MS, XRD and IR.


    Paper ID: JFS2004278

    DOI: 10.1520/JFS2004278

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    Title A Field Diagnostic Test for the Improvised Explosive Urea Nitrate
    Symposium , 0000-00-00
    Committee E30