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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 13 — May. 1, 2010
  • pp: C168–C180

Laser-induced breakdown spectroscopy-based geochemical fingerprinting for the rapid analysis and discrimination of minerals: the example of garnet

Daniel C. Alvey, Kenneth Morton, Russell S. Harmon, Jennifer L. Gottfried, Jeremiah J. Remus, Leslie M. Collins, and Michael A. Wise  »View Author Affiliations


Applied Optics, Vol. 49, Issue 13, pp. C168-C180 (2010)
http://dx.doi.org/10.1364/AO.49.00C168


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Abstract

Laser-induced breakdown spectroscopy (LIBS) is an analytical technique real-time geochemical analysis that is being developed for portable use outside of the laboratory. In this study, statistical signal processing and classification techniques were applied to single-shot, broadband LIBS spectra, comprising measured plasma light intensities between 200 and 960 ‚ÄČ nm , for a suite of 157 garnets of different composition from 92 locations worldwide. Partial least squares discriminant analysis was applied to sets of 25 LIBS spectra for each garnet sample and used to classify the garnet samples based on composition and geographic origin. Careful consideration was given to the cross-validation procedure to ensure that the classification algorithm is robust to unseen data. The results indicate that broadband LIBS analysis can be used to discriminate garnets of different composition and has the potential to discern geographic origin.

OCIS Codes
(140.3440) Lasers and laser optics : Laser-induced breakdown
(300.6365) Spectroscopy : Spectroscopy, laser induced breakdown

History
Original Manuscript: September 28, 2009
Manuscript Accepted: December 18, 2009
Published: March 19, 2010

Citation
Daniel C. Alvey, Kenneth Morton, Russell S. Harmon, Jennifer L. Gottfried, Jeremiah J. Remus, Leslie M. Collins, and Michael A. Wise, "Laser-induced breakdown spectroscopy-based geochemical fingerprinting for the rapid analysis and discrimination of minerals: the example of garnet," Appl. Opt. 49, C168-C180 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-13-C168

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