Chemical Characterization of Latent Fingerprints by Matrix-Assisted Laser Desorption Ionization, Time-of-Flight Secondary Ion Mass Spectrometry, Mega Electron Volt Secondary Mass Spectrometry, Gas Chromatography/Mass Spectrometry, X-ray Photoelectron Spectroscopy, and Attenuated Total Reflection Fourier Transform Infrared Spectroscopic Imaging: An Intercomparison
Autor: | Brian N. Jones, Benjamin Jones, Ruth Croxton, Rosalind Wolstenholme, Simona Francese, Stephen Hinder, Sergei G. Kazarian, Roger P. Webb, Jesus J. Ojeda, Nicholas J. Bright, Leesa Susanne Ferguson, Sue Jickells, Stephen M. Bleay, Melanie J. Bailey |
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Rok vydání: | 2012 |
Předmět: |
MALDI imaging
Chemistry Analytical chemistry Spectrometry Mass Secondary Ion Infrared spectroscopy Thermal ionization mass spectrometry Q1 Mass spectrometry Gas Chromatography-Mass Spectrometry Analytical Chemistry Secondary ion mass spectrometry Matrix-assisted laser desorption/ionization Spectrometry Mass Matrix-Assisted Laser Desorption-Ionization Attenuated total reflection Spectroscopy Fourier Transform Infrared RA1001 Humans QD Dermatoglyphics Gas chromatography–mass spectrometry |
Zdroj: | Analytical Chemistry. 84:8514-8523 |
ISSN: | 1520-6882 0003-2700 |
Popis: | The first analytical intercomparison of fingerprint residue using equivalent samples of latent fingerprint residue and characterized by a suite of relevant techniques is presented. This work has never been undertaken, presumably due to the perishable nature of fingerprint residue, the lack of fingerprint standards, and the intradonor variability, which impacts sample reproducibility. For the first time, time-of-flight secondary ion mass spectrometry, high-energy secondary ion mass spectrometry, and X-ray photoelectron spectroscopy are used to target endogenous compounds in fingerprints and a method is presented for establishing their relative abundance in fingerprint residue. Comparison of the newer techniques with the more established gas chromatography/mass spectrometry and attenuated total reflection Fourier transform infrared spectroscopic imaging shows good agreement between the methods, with each method detecting repeatable differences between the donors, with the exception of matrix-assisted laser desorption ionization, for which quantitative analysis has not yet been established. We further comment on the sensitivity, selectivity, and practicability of each of the methods for use in future police casework or academic research. |
Databáze: | OpenAIRE |
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