Presented as part of a commemorative issue for Wolfgang Kiefer on the occasion of his 65th birthday.
Evaluation of Raman spectroscopy and application of chemometric methods for the differentiation of contemporary ivory specimens I: elephant and mammalian species†
Article first published online: 12 JAN 2006
Copyright © 2006 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Special Issue: Commemorative Issue: for Wolfgang Kiefer on the Occasion of his 65th Birthday
Volume 37, Issue 1-3, pages 353–360, January - March 2006
How to Cite
Edwards, H. G. M., Hassan, N. F. N. and Arya, N. (2006), Evaluation of Raman spectroscopy and application of chemometric methods for the differentiation of contemporary ivory specimens I: elephant and mammalian species. J. Raman Spectrosc., 37: 353–360. doi: 10.1002/jrs.1458
- Issue published online: 12 JAN 2006
- Article first published online: 12 JAN 2006
- Manuscript Accepted: 19 JUL 2005
- Manuscript Received: 18 APR 2005
- mammalian species;
- principal component analysis;
- stepwise discriminant analysis
Specimens of mammoth, African and Asian ivory dentine, and other mammalian species were examined using Fourier–Transform (FT), conventional dispersive (confocal) and remote-sensing portable Raman spectroscopy, all with near-infrared laser excitation (1064 and 785 nm). FT-Raman spectroscopy produced the best quality spectra for differentiation purposes and the application of a fibre probe coupled to a portable Raman spectrometer has also been demonstrated and proposed for the in situ characterization of suspected contraband ivories at airports. In addition to the visual comparison of spectral features, chemometric methods are used to discriminate between African and Asian elephant dentine by analyzing normalized integrated band areas in ten selected wavenumber regions. Principal component analysis separates the spectra of both species into two well-defined groups based upon their organic and inorganic composition. By means of stepwise discriminant analysis almost 98% of the spectra are correctly classified to their species group memberships. Copyright © 2006 John Wiley & Sons, Ltd.