Use of Raman spectroscopy and chemometrics to distinguish blue ballpoint pen inks

Highlights • Raman spectroscopy and chemometrics were combined to differentiate 14 pen inks. • Spectral preprocessing removed the fluorescence contribution to Raman signal. • All inks were successfully differentiated by exploration and classification tools. • The relevant spectroscopic ranges to dif...

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Veröffentlicht in:	Forensic science international 2015-04, Vol.249, p.73-82
Hauptverfasser:	de Souza Lins Borba, Flávia, Saldanha Honorato, Ricardo, de Juan, Anna
Format:	Artikel
Sprache:	eng
Schlagworte:	Ballpoint pen ink analysis Chemometrics Chromatography Classification Discriminant analysis Forensic sciences Hierarchical cluster analysis (HCA) Inks Lasers Mass spectrometry Partial least squares-discriminant analysis (PLS-DA) Pathology Powers of attorney Principal component analysis Principal component analysis (PCA) Principal components analysis Raman spectra Raman spectroscopy Scientific imaging Similarity Spectral bands Trees
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Zusammenfassung:	Highlights • Raman spectroscopy and chemometrics were combined to differentiate 14 pen inks. • Spectral preprocessing removed the fluorescence contribution to Raman signal. • All inks were successfully differentiated by exploration and classification tools. • The relevant spectroscopic ranges to differentiate among inks were determined. • We report a fast, non-destructive and statistically sound method for ink analysis.
ISSN:	0379-0738 1872-6283
DOI:	10.1016/j.forsciint.2015.01.027