GC/MS Data from Fire Debris Samples: Interpretation and Applications

    Volume 44, Issue 5 (September 1999)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Page Count: 17


    (Jack) Wallace, JR
    Forensic scientist, Orange County Sheriff Crime Laboratory, Santa Ana, CA

    (Received 4 May 1998; accepted 15 December 1998)

    Abstract

    Mass chromatography is currently being adapted by many forensic laboratories as the preferred approach for interpreting GC/MS data from fire debris samples. This paper first describes software approaches for minimizing interferences and for facilitating the identification of petroleum liquids when using this approach. Next, guidelines are developed for recognizing chromatographic distortion that often occurs when petroleum liquids are recovered using the popular solid adsorption/elution method. It is seen that for a given petroleum liquid, paraffinic:aromatic ratios can vary eight fold depending on the recovery conditions and sample concentration. Finally, the application of these software tools and guidelines to case samples is illustrated, and an approach for categorizing an exemplar collection on the basis of qualitative features and peak height ratios is demonstrated.


    Paper ID: JFS12029J

    DOI: 10.1520/JFS12029J

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    Author
    Title GC/MS Data from Fire Debris Samples: Interpretation and Applications
    Symposium , 0000-00-00
    Committee E30