Combination of a Green and a Traditional Method for Estimating Relative and Absolute Ink Age: A Case Study of Ballpoint Pen Ink Dating in Vietnam.
Journal
Journal of analytical methods in chemistry
ISSN: 2090-8865
Titre abrégé: J Anal Methods Chem
Pays: Egypt
ID NLM: 101575377
Informations de publication
Date de publication:
2021
2021
Historique:
received:
11
09
2020
accepted:
02
05
2021
entrez:
31
5
2021
pubmed:
1
6
2021
medline:
1
6
2021
Statut:
epublish
Résumé
The dating of ink in questioned documents remains a significant challenge in forensic investigations in Vietnam and other countries. Many forensic examination methods have been usually applied to ensure the highest accuracy of the assessment results while maintaining high environment awareness. In this study, paper characteristics were physically tested to confirm source similarity, and the relative ink dating was established by high-performance thin-layer chromatography (HPTLC). Absolute ink dating by solvent and dye identification was performed by Raman spectrometry-a green technique, using a time-dependent degradation model for crystal violet and the comparison between 2-phenoxyethanol peak intensities. We found that the relative dating of the questioned document was 14 ± 3 months lesser than that of the reference samples, i.e., the absolute age of the questioned samples was estimated to be 24 ± 3 months. The combination of the conventional HPTLC method with the dynamic crystal violet degradation Raman model provides promising results for relative and absolute ink dating of ballpoint pens, which can be applied for documents written 1-15 years prior to the time of examination. The combination of the abovementioned methods demonstrated an acceptable error margin, affording highly practical applications in modern forensic science.
Identifiants
pubmed: 34055448
doi: 10.1155/2021/8870541
pmc: PMC8143886
doi:
Types de publication
Journal Article
Langues
eng
Pagination
8870541Informations de copyright
Copyright © 2021 Anh Duc Hoang et al.
Déclaration de conflit d'intérêts
The authors declare that there are no conflicts of interest.
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