Monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storage
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 become degraded. In this study, gas chromatography-mass spectrometry was used to...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier BV
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/47577 |
| _version_ | 1848757870970011648 |
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| author | Frick, Amanda Chidlow, Geoff Goodpaster, J. Lewis, Simon Van Bronswijk, Wilhelm |
| author_facet | Frick, Amanda Chidlow, Geoff Goodpaster, J. Lewis, Simon Van Bronswijk, Wilhelm |
| author_sort | Frick, Amanda |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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 become degraded. In this study, gas chromatography-mass spectrometry was used to monitor relative changes in the lipids from latent fingermarks over 28 days. Principal component analysis of the relative composition of 15 lipids in fingermarks showed that fingermark age was a significant contributor to the variability observed in the data, but that inter-donor variability was also significant. This was attributed principally to changes in the relative amounts of squalene, which rapidly decreased in the fingermarks. It was also observed, however, that most fingermarks exhibited relatively small changes in composition during the first seven days, followed by more rapid changes up to 28 days. Significant inter-donor variation of both initial fingermark composition and the rates and nature of loss processes was observed, which was reflected in the relative projection of samples from different donors. Finally, samples stored with no exposure to light or airflow for 28 days were projected significantly closer to the samples analysed on the day of deposition than those exposed to light, due to the reduced photodegradation rate of squalene. |
| first_indexed | 2025-11-14T09:34:58Z |
| format | Journal Article |
| id | curtin-20.500.11937-47577 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:34:58Z |
| publishDate | 2016 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-475772018-09-10T02:55:54Z Monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storage Frick, Amanda Chidlow, Geoff Goodpaster, J. Lewis, Simon Van Bronswijk, Wilhelm 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 become degraded. In this study, gas chromatography-mass spectrometry was used to monitor relative changes in the lipids from latent fingermarks over 28 days. Principal component analysis of the relative composition of 15 lipids in fingermarks showed that fingermark age was a significant contributor to the variability observed in the data, but that inter-donor variability was also significant. This was attributed principally to changes in the relative amounts of squalene, which rapidly decreased in the fingermarks. It was also observed, however, that most fingermarks exhibited relatively small changes in composition during the first seven days, followed by more rapid changes up to 28 days. Significant inter-donor variation of both initial fingermark composition and the rates and nature of loss processes was observed, which was reflected in the relative projection of samples from different donors. Finally, samples stored with no exposure to light or airflow for 28 days were projected significantly closer to the samples analysed on the day of deposition than those exposed to light, due to the reduced photodegradation rate of squalene. 2016 Journal Article http://hdl.handle.net/20.500.11937/47577 10.1016/j.forc.2016.09.001 Elsevier BV fulltext |
| spellingShingle | Frick, Amanda Chidlow, Geoff Goodpaster, J. Lewis, Simon Van Bronswijk, Wilhelm Monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storage |
| title | Monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storage |
| title_full | Monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storage |
| title_fullStr | Monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storage |
| title_full_unstemmed | Monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storage |
| title_short | Monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storage |
| title_sort | monitoring compositional changes of the lipid fraction of fingermark residues deposited on paper during storage |
| url | http://hdl.handle.net/20.500.11937/47577 |