A combination of vibrational and Xray fluorescence spectroscopies is being successfully applied to trace analysis. Forensic analysis of documents can involve identification of the composition of the inks, dyes and papers used. The combination of Raman, Infrared and Xray microscopy enables identification of both inorganic and organic materials with 1-10um spatial resolution (depending on the technique used). Examples of successful identification of document forgeries such as checks and passports will be presented. The same analytical techniques can also be used to identify forged and illicit drugs. Raman spectra of drugs can be examined directly in their packaging (if it is transparent) and small amounts of material extracted even at low concentrations can be identified when deposited on Tienta hydrophobic substrates. Finally Raman spectra of polymers will also indicate the potential usefulness for forensic matching of fibers collected from crime scenes and suspects' environments.
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Back to The 37th Middle Atlantic Regional Meeting (May 22-25, 2005)