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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > December  >
In the Laboratory
Raman Spectroscopy with a Fiber-Optic Probe and Multichannel Detection
Thomas J. Vickers, Jeanne Pecha, and Charles K. Mann
Department of Chemistry, Florida State University, Tallahassee, FL 32306-4390
Cover
December 2001
Vol. 78 No. 12
p. 1674
Abstract
This laboratory exercise is suitable for an undergraduate course in instrumental methods of analysis. The first part of the exercise illustrates some principles of multichannel detection applied to optical spectroscopy. A neon atomic line spectrum is recorded and used to relate detector element (pixel) position to spectrum wavelength. The spectrum of a white-light source is recorded to examine how the system response varies with wavelength. In the second part of the exercise rapid, nondestructive analysis by Raman spectroscopy is demonstrated. The spectra of some known materials are recorded and used to identify the major component (or components) of an unknown white powder sample. The composition of a liquid sample is determined by least-squares fitting of spectra of pure components to the sample spectrum. The use of a fiber-optic probe provides a demonstration of the many benefits of an approach increasingly employed for online measurements.
Supplement
Additional background information, the student handout, and notes for the instructor are available in PDF format.
*  Contents
*  Download
JCE2001p1674W.pdf
More Information
*  Citation
 Vickers, Thomas J.; Pecha, Jeanne; Mann, Charles K. J. Chem. Educ. 2001 78 1674.
*  Keywords
 Analytical Chemistry; Instrumental Methods; Laboratory Instruction; Raman Spectroscopy
*  History
 Created:
Last Updated:		 November 2, 2001
August 31, 2005
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