Nondestructive classification and identification of ballpoint pen inks by Raman spectroscopy for forensic document examinations
- Autores: Lee L.1, Samad M.1, Ismail M.1
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Afiliações:
- Forensic Sciences Program, Faculty of Health Sciences
- Edição: Volume 71, Nº 7 (2016)
- Páginas: 723-729
- Seção: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/181899
- DOI: https://doi.org/10.1134/S106193481607011X
- ID: 181899
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Resumo
As a non-destructive analytical method, Raman spectroscopy often provides insufficient information to identify or differentiate the ink used for the preparation of a questioned document. In this study, blue and black ballpoint pen inks deposited on paper substrate were examined in situ by conventional Raman spectroscopy. Inks were successfully classified based on the total number of prominent bands in Raman spectra. It was found that more than 90% of the samples of the same type and color could be differentiated visually using only Raman spectra, i.e. 94 and 95% for blue and black inks, respectively. As a result of this study, a flow chart has been constructed for blue and black ballpoint pen inks allowing their systematic identification. Raman spectroscopy proved to be a fast and precise technique for forensic ink analysis.
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Sobre autores
Loong Lee
Forensic Sciences Program, Faculty of Health Sciences
Autor responsável pela correspondência
Email: lc_lee@ukm.edu.my
Malásia, Kuala Lumpur, 50300
Muhammad Samad
Forensic Sciences Program, Faculty of Health Sciences
Email: lc_lee@ukm.edu.my
Malásia, Kuala Lumpur, 50300
Mohamad Ismail
Forensic Sciences Program, Faculty of Health Sciences
Email: lc_lee@ukm.edu.my
Malásia, Kuala Lumpur, 50300