A comparison of the natural and groomed fingermark lipid composition of different donors using GC/MS

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License: CC BY-NC-ND 4.0
Serval ID
serval:BIB_124F48CECA31
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
A comparison of the natural and groomed fingermark lipid composition of different donors using GC/MS
Journal
Forensic Science International
Author(s)
Merlo Moraleda Ana Belen, Roux Claude, Bécue Andy, Weyermann Céline
ISSN
0379-0738
Publication state
Published
Issued date
2023
Peer-reviewed
Oui
Volume
348
Pages
111709
Language
english
Abstract
The lipid composition of natural fingermarks was studied and compared with the composition of groomed residue. Approximately 100 specimens were collected from 6 donors over three sessions (in October, December and July) and analysed using gas chromatography / mass spectrometry (GC/MS). The measured lipid content was generally lower and more variable in natural fingermarks than in groomed fingermarks. Some significant variability was noticed. Relative standard deviations were the highest between donors (generally above 100%) but were also relatively high within donor within a session (from 21 to 80%) and between sessions (from 34 to 126%). The fingermarks from one of the donors generally contained higher relative amounts of lipids in both groomed and natural residue compared to the others. All other fingermarks led to very variable amounts and did not allow classifying the other donors as constantly "good" or "poor" donors. Squalene was the major compound in all marks, particularly in groomed specimens. A correlation between squalene, cholesterol, myristic acid, palmitoleic acid, stearyl palmitoleate and pentadecanoic acid was highlighted. Oleic and stearic were also correlated together but generally more in natural than groomed marks. The obtained results may be particularly useful to better understand the detection mechanisms for techniques targeting lipids and to develop artificial fingermark secretions to further support the development of detection techniques.
Keywords
Forensic Science, Fingerprints, Sebaceous secretions, Lipids, Squalene, Variability
Open Access
Yes
Funding(s)
Swiss National Science Foundation / Projects / 205121_169677
Create date
02/05/2023 7:25
Last modification date
20/06/2023 6:08
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