Application of Micro-Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy to Ink Examination in Signatures Written with Ballpoint Pen on Questioned Documents

Authors
Nam, Yun SikPark, Jin SookLee, YeonheeLee, Kang-Bong
Issue Date
2014-05
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF FORENSIC SCIENCES, v.59, no.3, pp.800 - 805
Abstract
Questioned documents examined in a forensic laboratory sometimes contain signatures written with ballpoint pen inks; these signatures were examined to assess the feasibility of micro-attenuated total reflectance (ATR) Fourier transform infrared (FTIR) spectroscopy as a forensic tool. Micro-ATR FTIR spectra for signatures written with 63 ballpoint pens available commercially in Korea were obtained and used to construct an FTIR spectral database. A library-searching program was utilized to identify the manufacturer, blend, and model of each black ballpoint pen ink based upon their FTIR peak intensities, positions, and patterns in the spectral database. This FTIR technique was also successfully used in determining the sequence of homogeneous line intersections from the crossing lines of two ballpoint pen signatures. We have demonstrated with a set of sample documents that micro-ATR FTIR is a viable nondestructive analytical method that can be used to identify the origin of the ballpoint pen ink used to mark signatures.
Keywords
RAMAN-SPECTROSCOPY; MASS-SPECTROMETRY; FTIR SPECTROSCOPY; FORENSIC-SCIENCE; EVIDENTIAL VALUE; WRITING INKS; GEL INKS; BLUE; CHROMATOGRAPHY; INVESTIGATE; RAMAN-SPECTROSCOPY; MASS-SPECTROMETRY; FTIR SPECTROSCOPY; FORENSIC-SCIENCE; EVIDENTIAL VALUE; WRITING INKS; GEL INKS; BLUE; CHROMATOGRAPHY; INVESTIGATE; micro-attenuated total reflectance Fourier transform infrared spectroscopy; intersecting lines; questioned documents; signature; forensic science; ballpoint pen
ISSN
0022-1198
URI
https://pubs.kist.re.kr/handle/201004/126840
DOI
10.1111/1556-4029.12405
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KIST Article > 2014
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