Investigations into the initial composition of latent fingermark lipids by gas chromatography-mass spectrometry
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A more comprehensive understanding of the variability of latent fingermark composition is essential to improving current fingermark detection capabilities in an informed manner. Gas chromatography–mass spectrometry was used to examine the composition of the lipid fraction of latent fingermarks collected from a population of over 100 donors. Variations in the appearances of chromatograms from different donors were apparent in the relative peak sizes of compounds including free fatty acids, squalene, cholesterol and wax esters. Principal component analysis was used as an exploratory tool to explore patterns in this variation, but no correlation to donor traits could be discerned. This study also highlights the practical and inherent difficulties in collecting reproducible samples.
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Zadnik, S.; Van Bronswijk, Wilhelm; Frick, Amanda; Fritz, Patrick; Lewis, Simon (2013)Commercially available fingermark simulants werecompared to latent fingermark deposits to assess their efficacy asstandards for a quality control assessment of fingermark developmentreagents. Deposits of the simulants and ...
Frick, Amanda Akiko (2015)The lipid fraction of latent fingermark residue encompasses a number of compounds crucial to fingermark detection on wetted porous substrates. This thesis describes investigations into the detection and chemical analysis ...
Fritz, Patrick (2015)The aim of this research was to carry out investigations into the amino acid chemistry of latent fingermarks. Amino acids are the primary targets of chemical visualisation methods for fingermarks deposited on porous ...