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https://doi.org/10.37358/Rev.Chim.1949

OSIM Nr. R102355
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Revista de Chimie (Rev. Chim.), Year 2014, Volume 65, Issue 4,





Daniela Laura Feraru, Aurelia Meghea
Comparative Forensic Analysis of Ballpoint Pen Inks

Abstract:

Forensic examination of questioned documents often includes identification, separation and determination of the components of ink that are deposited on the paper during the writing process. There are many possibilities leading to the development of methods for ink analysis. This paper aims to assess the possibility of discriminating in a forensic analysis of a series of ballpoint pastes and identify the dyes used for ballpoint pen inks using X-ray fluorescence, thin layer chromatography (TLC) and UV-Vis-NIR spectroscopy in diffuse reflectance and absorbance modes completed by chromatic analysis in CIE-L*a*b* system. Corroboration of trichromatic analysis, particularly that performed in methanolic extracts, with TLC data provides a valuable tool for discriminating of ballpoint inks within the same coloristic pallet and also for assessing some components by comparing with reference dyes available from adequate data bases. Keywords: ballpoint inks, dyes, thin layer chromatography, chromatic analysis


Issue: 2014, Volume 65, Issue 4
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