Application of micro-raman and ft-ir spectroscopy in forensic analysis of automotive topcoats in the Republic of Macedonia
Keywords:micro-Raman and FT-IR spectroscopy, automotive paints, pigment identification, forensic investigations, criminalistics
Raman and infrared spectroscopy are two complementary spectroscopic techniques that can produce fast, efficient and accurate detection of the pigments and/or binders used in automotive topcoats. Micro-Raman spectroscopy, due to its non-destructiveness, has been extensively used for identification of pigments and dyes in forensic investigation of hit-and-run accidents. This technique provides very useful and significant information from very small samples of evidence without any previous preparation of the sample. The recorded Raman spectra of the unknown/ suspected samples can be compared with a spectrum of the referent sample, which can coincide with the one already existing in the Raman database of pigments. In order to form our own spectral database of automotive paints for forensic investigations in hit-and-run offences in Republic of Macedonia, an investigation of automotive topcoats of different origins was carried out. In our previous study, pigments in some automotive topcoats, produced by Mobihel, have been identified using micro- Raman and FT-IR spectroscopy. In the present study, we report micro-Raman and FT-IR spectra of ten base coat automotive topcoats, as well as some of their mixtures, produced by Glasürit. In order to demonstrate the availability and/or the advantages of the micro-Raman spectroscopic technique in forensic investigation in road accidents, four successfully solved cases from the police investigation in hit-and-run accidents are presented in this work.
W. Stoecklein and S. Becker, Paint and Glass, 13th International Forensic Science Symposium, Lyon, France, October 16–19, 2001, Reviews–Abstracts D1: 1998–2001, p.120–173.
A. Beveridge, T. Fung and D. MacDougal, Chapter 10: Use of Infrared Spectroscopy for the Characterization of Paint Fragments, in Forensics Examination of Glass and Paint – Analysis and Interpretation, Edited by Brian Caddy, Taylor & Francis Group, Bookstore, 2001.
J. De Delder, P. Vandenabeele, F. Govaert, L. Moens, Forensics analysis of automotive paints by Raman spectroscopy, J. Raman Spectrosc., 36, 1050–1067 (2005)
M. Skenderovska, B. Minčeva-Šukarova, FT-infrared and micro-Raman spectra of automotive topcoats: I. Some acrylic automotive paints products of “Mobihel”, XVII Congress of Chemists and Technologists of Macedonia, Book of Abstracts, SSC-10, p. 262, September 2004, Ohrid, Republic of Macedonia.
Automotive paint systems, http:www.Glasurit.com.de
M. Skenderovska, B. Minčeva-Šukarova, Application of micro-Raman spectroscopy in forensic analysis of automotive paints in some hit-and-run cases, Fifth Congress of the Balkan Academy of Forensic Sciences, Book of Abstract, p. 87, June 2007, Ohrid, Republic of Macedonia.
H. A. Kim and W. H. Jo, Studies on polymer-Metal Interfaces, 4a, effect of subsistent of Polymethacrylate on the Interfacial Characteristics between Polymethacrylates and Copper, Macromol. Chem. Phys. 202, 3065–3070 (2001).
H. W. Choi, H. J. Woo, W. Hong, J. K. Kim, S. K. Lee, C. H. Eum, Structural modification of poly(methyl methacrylate) by proton irradiation, Appl. Surface Science, 169–170, 433–437 (2001).
A. Balamurugan, S. Kannan, V. Selvaraj and S. Rajeswari, Development and Spectral Characterization of Poly(Methyl Methacrylate)/Hydroxyapatite Composite for Biomedical Applications, Trends Biomater. Artif. Organs, 8, 41–45 (2004).
E. M. Suzuki and W. P. Marshal, Infrared spectra of U.S. automobile original topcoats (1974–1989): III. In situ identification of some organics pigments used in yellow, orange, red and brown metallic finishes – benzimidazolones, J. Forensics Studies, 42, 619–648 (1997).
W. Stoecklein and S. Becker, Paint and Glasses, 13th INTERPOL Forensics Science Symposium, Lyon, France, October 16–19 (2001), D1, 121–173.
I. M. Bell, R. J. H. Clark, P. J. Gibbs, Raman spectroscopic library of natural and synthetic pigments (pre- ∼1850 AD), Spectrochim. Acta A 53, 2159–2179 (1997). (http://www.chem.ucl.ac.uk/resources/raman/index.html)
G. Massonnet and W. Stoecklein, Identification of organic pigments in coatings: application to red automotive topcoats. Part III: Raman spectroscopy (NIR FT-Raman), Sci Justise, 39, 181–187 (1999).
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