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Proceedings Paper

Characterization of surface contaminants using infrared microspectroscopy
Author(s): Dianna S. Blair; Kenneth J. Ward
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Paper Abstract

Infrared spectroscopy (IR) is a vibrational spectroscopic technique used for the nondestructive identification of molecular species. It provides information about molecular structure by determining the frequency and intensity of light a compound absorbs in the infrared region. The resultant IR absorption spectrum is characteristic of the compound. This spectrum is considered one of the compound's physical properties, like its density or boiling point. However, unlike these other properties only optical isomers have identical infrared absorption spectra. Infrared spectroscopy can be performed on molecular species in any physical state. Therefore, gases, liquids, and solids can all be sampled. Generally, because of the high information content of the infrared spectra of organic molecules IR is most useful for the identification of organic materials. However, many inorganics also exhibit IR detectable molecular vibrations and therefore can be identified by this technique. The paper deals briefly with the use of infrared spectrometers coupled to microscopes, and methods of compressing spectral data by integrating absorbance intensity over a characteristic frequency range.

Paper Details

Date Published: 1 April 1991
PDF: 4 pages
Proc. SPIE 1437, Applied Spectroscopy in Material Science, (1 April 1991); doi: 10.1117/12.45133
Show Author Affiliations
Dianna S. Blair, Sandia National Labs. (United States)
Kenneth J. Ward, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 1437:
Applied Spectroscopy in Material Science
David D. Saperstein, Editor(s)

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