Infrared microscopy studies of the chemical composition of latent fingermark residues
MetadataShow full item record
Synchrotron-infrared microscopy provides a non-destructive technique to investigate the chemical composition of latent fingermarks in-situ. The high spatial resolution and brightness of the synchrotron source also lends itself to the chemical characterisation of trace amounts of material on surfaces. However, only the lipid fraction of fingermark deposits is targeted when transmission-reflection is used. The fingermark lipid residues appeared to be relatively homogenous in composition across the deposit for any particular donor. No significant variation in the lipid composition as a function of age or gender of the donor was observed.Investigations into fingermark degradation were carried out by collecting spectra from fingermarks at three month intervals. An overall decrease in signal intensity was observed, ascribed to evaporation of the fingermark deposit. Greatest loss of material appeared to occur during the first 3 months following deposition. However, no significant variation in lipid composition was detected over a 9-month period.The outcomes of this study indicate that latent fingermark visualisation reagents that target lipids should produce accurate and reliable renditions of fingermarks irrespective of the age or gender of the donor, albeit with reduced sensitivity as the fingermark ages.
NOTICE: this is the author’s version of a work that was accepted for publication in Microchemical Journal. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Microchemical Journal, Vol. 111 (2013). DOI: 10.1016/j.microc.2012.08.005
Showing items related by title, author, creator and subject.
Monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storageFrick, Amanda; Chidlow, Geoff; Goodpaster, J.; Lewis, Simon; Van Bronswijk, Wilhelm (2016)Characterising the changes in fingermark composition as a function of time is of great value for improving fingermark detection capabilities by understanding the processes and circumstances under which target compounds ...
Revealing the spatial distribution of chemical species within latent fingermarks using vibrational spectroscopyDorakumbura, B.; Boseley, R.; Becker, Thomas; Martin, D.; Richter, A.; Tobin, M.; van Bronswjik, W.; Vongsvivut, J.; Hackett, Mark; Lewis, Simon (2018)Latent fingermarks are an important form of crime-scene trace evidence and their usefulness may be increased by a greater understanding of the effect of chemical distribution within fingermarks on the sensitivity and ...
Sandison, Carolyn M. (2001)The importance of organic sulphur fixation in the preservation of organic matter in humic coal-forming environments is demonstrated in this thesis. The transgression of coal depositional systems by marine waters during ...