Premium
Laser‐induced breakdown spectroscopy and chemometric analysis of black toners for forensic applications
Author(s) -
Ahmed Zakaria E.,
Abdelhamid Mahmoud,
AbdelSalam Zienab A.,
Palleschi Vincenzo,
AbdelHarith Mohamed
Publication year - 2021
Publication title -
journal of chemometrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.47
H-Index - 92
eISSN - 1099-128X
pISSN - 0886-9383
DOI - 10.1002/cem.3334
Subject(s) - laser induced breakdown spectroscopy , chemometrics , spectroscopy , materials science , analytical chemistry (journal) , chemistry , environmental chemistry , chromatography , physics , quantum mechanics
In the present work, laser‐induced breakdown spectroscopy (LIBS) was used to differentiate between different black toners of printers and photocopiers based on their elemental composition. Measurements were performed on 23 toner samples of different printers and six different photocopiers (of different brands and models). The LIBS spectra were compared to characterize each toner type. Multivariate statistical analysis based on PCA and graph clustering was used to develop a discrimination model between the toners in questioned documents. Good discrimination of both brand and model toners was obtained. The results may be beneficial for forensic applications in the investigations of questioned documents.