Changes in latent fingermark glyceride composition as a function of sample age using UPLC-IMS-QToF-MSE

Détails

Ressource 1Télécharger: Frick et al. (2020) Fingermark TG composition over time. The Analyst.pdf (1069.86 [Ko])
Etat: Public
Version: de l'auteur
Licence: Tous droits réservés
ID Serval
serval:BIB_7BDFE3216EBC
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Changes in latent fingermark glyceride composition as a function of sample age using UPLC-IMS-QToF-MSE
Périodique
The Analyst
Auteur(s)
Frick Amanda A., Kummer Natalie, Moraleda Ana, Weyermann Céline
ISSN
0003-2654
1364-5528
Statut éditorial
Publié
Date de publication
2020
Peer-reviewed
Oui
Volume
145
Numéro
12
Pages
4212-4223
Langue
anglais
Résumé
The composition of fingermark residue has been an important topic in forensic science, mainly in efforts to better understand and eventually improve the efficacy of latent fingermark detection methods. While the lipid fraction has been extensively studied, there is currently little information about how the glyceride fraction of latent fingermarks is chemically altered over time following deposition. A previously reported untargeted ultra performance liquid chromatography-ion mobility spectrometry-quadrupole time-offlight
mass spectrometry (UPLC-IMS-QToF-MSE) method was used to investigate changes over time in fingermark di- and triglycerides. Charged latent fingermark samples from 5 donors were analysed up to 28 days following deposition. Significant changes in glyceride composition occurred with increased sample age, attributed primarily to the oxidation of unsaturated triglycerides through ozonolysis. Considerably fewer unsaturated TGs were identified in samples 7 and 28 days following deposition, while mono- and diozonides of these lipids were identified as major components of aged samples. Additional compounds were identified as possible aldehyde and carboxylic acid derivatives resulting from the reaction
of water with ozonolysis intermediates. While the onset of these processes occurred rapidly following deposition, continuing oxidation over time was seen via the progressive ozonolysis of diunsaturated triglycerides. These results represent a further step towards understanding the factors affecting fingermark composition, ageing and subsequent detection under operational conditions.
Mots-clé
Analytical Chemistry, Spectroscopy, Electrochemistry, Biochemistry, Environmental Chemistry
Pubmed
Financement(s)
Fonds national suisse / 205121_169677
Création de la notice
01/05/2020 11:22
Dernière modification de la notice
29/06/2020 7:09
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