Processing and Interpreting Mass Spectral Data in Forensic Identification of Drugs and Explosives

    Volume 22, Issue 4 (October 1977)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Published Online: 1 October 1977

    Page Count: 6


    Yinon, J
    Weizmann Institute of Science, Rehovot,

    Zitrin, S
    Weizmann Institute of Science, Rehovot,

    (Received 7 March 1977; accepted 18 April 1977)

    Abstract

    Mass spectrometry has become a well-established analytical method in the forensic identification of drugs and explosives [1,2]. In electron impact (EI) mass spectrometry (MS) the investigated sample is ionized by an electron beam having an energy of 70 eV. Because of this high ionization energy, the ions, after their formation, will usually decompose to fragmentation products including both charged and neutral species. The complexity of the EI mass spectrum, while often an important asset because of its “fingerprint” value, is clearly a disadvantage when complex mixtures are to be analyzed. When the compound is more complex, the amount of fragment ions is larger and the chances of observing a molecular ion are smaller. Electron impact mass spectrometry can be applied to mixtures, but only after separation, usually performed by a gas chromatograph-MS combination.


    Paper ID: JFS10413J

    DOI: 10.1520/JFS10413J

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    Title Processing and Interpreting Mass Spectral Data in Forensic Identification of Drugs and Explosives
    Symposium , 0000-00-00
    Committee E30