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Proceedings Paper

A purged-gas containment cell for infrared absorbance measurements
Author(s): Roger J. Combs; Alan S. Cummings; Mark J. Thomas; Robert T. Kroutil
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Paper Abstract

The purged gas containment cell is composed of readily available materials. This cell is charged with analyte samples under the conditions of ambient temperature and pressure. The analyte samples are obtained from dilution of commercially available pure material in lecture bottles. This is achieved by injecting pure analyte material into a Tedlar® bags during filling with a known amount of nitrogen diluent. This study demonstrates the utility of the approach using a series of gas samples with concentration-pathlength products spanning the Beer's law range of infrared absorbances. These absorbance values and blackbody radiance levels are within the linearity range of both the active and passive Fourier transform infrared spectrometers that are used in this study. In addition, these conditions are representative of environments that are often encountered in open-air measurements.

Paper Details

Date Published: 9 November 2005
PDF: 18 pages
Proc. SPIE 5994, Chemical and Biological Sensors for Industrial and Environmental Security, 59940S (9 November 2005); doi: 10.1117/12.629757
Show Author Affiliations
Roger J. Combs, Research & Technology Consultants (United States)
Alan S. Cummings, Tetra Tech EM, Inc. (United States)
Mark J. Thomas, U.S. EPA Region VII (United States)
Robert T. Kroutil, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 5994:
Chemical and Biological Sensors for Industrial and Environmental Security
Arthur J. Sedlacek III; Steven D. Christesen; Roger J. Combs; Tuan Vo-Dinh, Editor(s)

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