Visualising substrate–fingermark interactions: Solid-state NMR spectroscopy of amino acid reagent development on cellulose substrates

Spindler, Xanthe; Shimmon, Ronald; Roux, Claude; Lennard, Chris

doi:10.1016/j.forsciint.2015.02.019

Cited by 2 publications

(1 citation statement)

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“…They are also the most important chemical target for development of fingermarks on porous surfaces such as paper. Because amino acids are larger molecules than urea and sodium chloride and can also interact with the cellulose chains in the substrate (Spindler, Shimmon, Roux, & Lennard, 2011; Spindler, Shimmon, Roux, & Lennard, 2015), they do not generally migrate from the site of initial deposition unless exposed to high humidity or fully immersed in water. Fingermarks on paper can therefore be detected using amino acid reagents many years after deposition unless exposed to such adverse conditions (Bleay, Fitzgerald, Sears, & Kent, 2019).…”

Section: Utilization Of Fingermark Chemistry In Mark Enhancementmentioning

confidence: 99%

The forensic exploitation of fingermark chemistry: A review

Bleay

Bailey

Croxton

et al. 2020

WIREs Forensic Science

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The substances deposited from the fingertip onto a surface during contact between them represent a highly complex range of chemicals that can be exploited in a variety of ways in a forensic investigation. An overview is given of the multitude of chemicals that have been detected in fingermarks, including those occurring in endogenous sweat, metabolites of ingested substances, and exogenous substances picked up on the fingertip. Changes in chemistry that may occur between deposition of the fingermark and its subsequent forensic analysis are discussed, with particular reference to the ways in which these changes have been considered as a means of dating fingermarks. The ways in which fingermark enhancement reagents utilize the different chemicals present to reveal ridge is reviewed, together with how different classes of chemical can be sequentially targeted to optimize the number of fingermarks recovered.A field of increasing interest is the use of advanced analytical techniques incorporating mass spectrometry and imaging capability to simultaneously obtain additional contextual information about the donor of the mark while visualizing the fingermark ridge pattern. Examples are given of how such information can be applied in forensic investigations. It is concluded that an extensive "tool kit" of fingermark enhancement processes is already available to utilize the different chemicals present, and the advances that can be made in this field using conventional approaches are limited. There is, instead, significant potential to utilize analytical techniques to forensically exploit the chemical information within fingermarks but there are also significant barriers to their implementation in this way.

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Section: Utilization Of Fingermark Chemistry In Mark Enhancementmentioning

confidence: 99%