Justin Bueno - Attenuated Total Reflectance-FT-IR Spectroscopy for Gunshot Residue Analysis: Potential for Ammunition Determination

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      Publication Details (including relevant citation   information):

        Bueno, J.;   Sikirzhytski, V.; Lednev, I. K., Analytical Chemistry,   2013, 85 (15), 7287-7294.     DOI:   10.1021/ac4011843.

      Abstract:

      The ability to link a suspect to a particular shooting incident   is a principal task for many forensic investigators. Here, we   attempt to achieve this goal by analysis of gunshot residue (GSR)   through the use of attenuated total reflectance (ATR) Fourier   transform infrared spectroscopy (FT-IR) combined with statistical   analysis. The firearm discharge process is analogous to a complex   chemical process. Therefore, the products of this process (GSR)   will vary based upon numerous factors, including the specific   combination of the firearm and ammunition which was discharged.   Differentiation of FT-IR data, collected from GSR particles   originating from three different firearm–ammunition combinations   (0.38 in., 0.40 in., and 9 mm calibers), was achieved using   projection to latent structures discriminant analysis (PLS-DA).   The technique was cross (leave-one-out), both internally and   externally, validated. External validation was achieved via   assignment (caliber identification) of unknown FT-IR spectra from   unknown GSR particles. The results demonstrate great potential   for ATR-FT-IR spectroscopic analysis of GSR for forensic   purposes.

      Address (URL): http://pubs.acs.org/doi/abs/10.1021/ac4011843?prevSearch=justin%2Bbueno&searchHi storyKey=