Development of a printed quality control test strip for the analysis and imaging of fingermark composition.

Details

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State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_E3DD2BD562A8
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Development of a printed quality control test strip for the analysis and imaging of fingermark composition.
Journal
Forensic science international
Author(s)
Gorka M., Thomas A., Bécue A.
ISSN
1872-6283 (Electronic)
ISSN-L
0379-0738
Publication state
Published
Issued date
12/2021
Peer-reviewed
Oui
Volume
329
Pages
111063
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
In the last decade, there have been many scientific developments regarding the use of mass spectrometry to analyse the composition of fingermarks. In this context, the development of a dedicated quality control test strip would benefit the forensic community by providing a way to assess the reproducibility of the measures as well as to perform inter-laboratory comparisons. To accomplish this goal, the use of a chemical printer offers the possibility of combining a visual template with artificial fingerprint secretions. The design of the quality control test strip as well as the preliminary assessment of its performance with fingermark detection reagents and matrix-assisted laser desorption-ionisation combined with mass spectrometry imaging (MALDI-MSI) are presented in this paper. The chosen template combines two geometric patterns intended to help assess the chemical analysis (full square) and imaging (lined square) capabilities of the instrument. The artificial secretion is composed of two distinct solutions: artificial sweat and artificial sebum. The printing reproducibility and chemical homogeneity of the quality control test strips were assessed in two ways: (1) using MALDI-MSI, the printed pattern was analysed and the m/z values compared to the reference list based on the artificial secretion composition, and (2) using two common fingermark detection techniques, the printed pattern was processed using an amino acid reagent (ninhydrin) and a lipid stain (Oil Red O). Overall, the results highlight the potential of a printed quality control test strip for the assessment of the quality of fingermark detection techniques as well as the possibility of performing quality monitoring of mass-spectrometry-based techniques over time.
Keywords
Pathology and Forensic Medicine, Law, Artificial secretion, Chemical printer, Forensic science, MALDI-MSI, Sebum, Sweat
Pubmed
Web of science
Open Access
Yes
Funding(s)
Swiss National Science Foundation / 205121_182180
Create date
29/10/2021 12:37
Last modification date
12/02/2022 7:33
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