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 ...
Fritz, Patrick; Van Bronswijk, Wilhelm; Patton, Emma; Lewis, Simon (2013)Amino acid variability in sweat may affect the ability of amino acid-sensitive fingermark reagents to successfully develop all latent fingermarks within a large population. There has been some speculation that age, gender, ...
Variability and subjectivity in the grading process for evaluating the performance of latent fingermark detection techniquesFritz, Patrick; Frick, Amanda; Van Bronswijk, Wilhelm; Lewis, Simon; Beaudoin, A.; Bleay, S.; Lennard, C. (2015)When assessing latent fingermark development methods, forensic researchers commonly evaluate treated samples using a grading scale. However, the subjective nature of these evaluation methods leaves the results of such ...