A purged-gas containment cell for infrared absorbance measurements

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...

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Bibliographic Details
Published inProceedings of SPIE Vol. 5994; no. 1; pp. 59940S - 59940S-18
Main Authors Combs, Roger J, Cummings, Alan S, Thomas, Mark J, Kroutil, Robert T
Format Conference Proceeding
LanguageEnglish
Published Bellingham (Wash., USA) SPIE 09.11.2005
Subjects
Analytical chemistry
Chemistry
Exact sciences and technology
General, instrumentation
Blackbody
Fourier transform spectroscopy
Hydrocarbon
Ethylene
Infrared spectrometry
Absorbance
Propene
Analysis method
Cyclopropane
Infrared spectrometers
Freon
Sampling
Room temperature
Organic compounds
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Summary: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.
Bibliography:Conference Date: 2005-10-23|2005-10-26
Conference Location: Boston, MA, United States
ISBN:9780819460189
0819460184
ISSN:0277-786X
DOI:10.1117/12.629757