Reproduced with the permission of the Controller of Her Majesty's Stationery Office/Queen's Printer for Scotland and Department of Justice for Northern Ireland - Forensic Science Northern Ireland.
Comparison of the discriminating power of Raman and surface-enhanced Raman spectroscopy with established techniques for the examination of liquid and gel inks†
Article first published online: 15 MAR 2013
© 2013 John Wiley & Sons Ltd and Crown copyright.
Journal of Raman Spectroscopy
Volume 44, Issue 4, pages 509–517, April 2013
How to Cite
Bell, S. E. J., Stewart, S. P., Ho, Y. C., Craythorne, B. W. and Speers, S. J. (2013), Comparison of the discriminating power of Raman and surface-enhanced Raman spectroscopy with established techniques for the examination of liquid and gel inks. J. Raman Spectrosc., 44: 509–517. doi: 10.1002/jrs.4202
- Issue published online: 10 APR 2013
- Article first published online: 15 MAR 2013
- Manuscript Revised: 14 SEP 2012
- Manuscript Accepted: 14 SEP 2012
- Manuscript Received: 21 JUN 2012
The ability to discriminate between inks is important for forensic document analysis. Here, Raman spectroscopy (RS) and surface-enhanced RS have been compared to the traditional document examination techniques of video spectral comparison and thin layer chromatography on a population of blue and black-coloured liquid and gel inks. It was found that in most cases, the Raman techniques provided a similar or better discriminating power than the conventional methods. Importantly, this study allowed us to determine whether the same underlying changes in composition were being exploited by the different methods to discriminate between samples. It was found that there was indeed a high degree of commonality in the sample pairs being discriminated by the various techniques. This work can therefore underpin introduction of Raman methods into standard operating procedures for ink analysis since it not only measures the extent of discrimination between samples but can also explain the origin of the spectral changes that are used to distinguish between them. © 2013 John Wiley & Sons Ltd and Crown copyright