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                            Library & Multimedia
 Simultaneous Imaging of Latent Fingermarks and Detection of Analytes of Forensic Relevance by Laser Ablation Direct Analysis in Real Time Imaging-Mass Spectrometry (LADI-MS)
NCJ Number
              255761
Journal

*Forensic Chemistry* Volume: 15 Dated: August 2019
Author(s)
          Kristen L. Fowble;
                        Rabi H. Musah
Date Published

August 2019
Length
              10 pages
Annotation
              This article reports on a project that applied the technique of laser ablation direct analysis in real time imaging-mass spectrometry (LADI-MS) to image the spatial distributions of small molecules of potential forensic relevance in latent fingermarks on non-conductive surfaces.
Abstract
              Traditional analysis of latent fingermarks using dusting powders and cyanoacrylate fuming uncovers only the physical pattern of the fingerprint ridges, neglecting vast amounts of chemical information within the residue that could divulge more about the owner. Imaging mass spectrometry provides a means to retain the fingerprint ridge detail for identification while also revealing additional chemical information. By using the method described in this article, no solvent, matrix, or high-vacuum conditions were required. An index finger was exposed to cocaine, psychoactive "legal high" plant material, pseudoephedrine, or the explosive RDX, and a fingermark was subsequently deposited on a glass slide for analysis. LADI-MS revealed the spatial distribution of endogenous cholesterol (localized to fingerprint ridges) and simultaneously detected the psychoactive small molecules cocaine, yangonin (derived from Piper methysticum), pseudoephedrine and the explosive RDX in latent fingermarks. The spatial distribution mapping of cholesterol in a lifted print on the non-conductive adhesive side of tape was also accomplished. The ion images of endogenous compounds and detection of exogenous molecules reveal details of chemical exposures, while connecting the exposure to the owner of the print. (publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2017-R2-CX-0003
                                2015-DN-BX-K057


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)
                                Report (Study/Research)
                                Report (Grant Sponsored)
                                Program/Project Description


  
  
        
  Award
        Development of Ambient Ionization Mass Spectrometric and Multivariate Statistical Analysis Methods for Rapid High Throughput Analysis and Identification of Psychotropic Plant Species
                                Development and Application of Small-molecule Spatial Distribution Imaging: Laser Ablation Direct Analysis in Real Time Imaging-Mass Spectrometry (LADI-MS)
    
  
  
Date Published: August 1, 2019
    
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                Fingerprint analysis
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