Creation of 0.10-cm-1 resolution quantitative infrared spectral libraries for gas samples

Steven W. Sharpe; Robert L. Sams; Timothy J. Johnson; Pamela M. Chu; George C. Rhoderick; Franklin R. Guenther

doi:10.1117/12.455730

22 February 2002 Creation of 0.10-cm^-1 resolution quantitative infrared spectral libraries for gas samples

Steven W. Sharpe, Robert L. Sams, Timothy J. Johnson, Pamela M. Chu, George C. Rhoderick, Franklin R. Guenther

Proceedings Volume 4577, Vibrational Spectroscopy-based Sensor Systems; (2002) https://doi.org/10.1117/12.455730
Event: Environmental and Industrial Sensing, 2001, Boston, MA, United States

Abstract

The National Institute of Standards and Technology (NIST) and the Pacific Northwest National Laboratory (PNNL) are independently creating quantitative, approximately 0.10 cm^-1 resolution, infrared spectral libraries of vapor phase compounds. The NIST library will consist of approximately 100 vapor phase spectra of volatile hazardous air pollutants (HAPs) and suspected greenhouse gases. The PNNL library will consist of approximately 400 vapor phase spectra associated with DOE's remediation mission. A critical part of creating and validating any quantitative work involves independent verification based on inter-laboratory comparisons. The two laboratories use significantly different sample preparation and handling techniques. NIST uses gravimetric dilution and a continuous flowing sample while PNNL uses partial pressure dilution and a static sample. Agreement is generally found to be within the statistical uncertainties of the Beer's law fit and less than 3 percent of the total integrated band areas for the 4 chemicals used in this comparison. There does appear to be a small systematic difference between the PNNL and NIST data, however. Possible sources of the systematic difference will be discussed as well as technical details concerning the sample preparation and the procedures for overcoming instrumental artifacts.

Citation Download Citation

Steven W. Sharpe, Robert L. Sams, Timothy J. Johnson, Pamela M. Chu, George C. Rhoderick, and Franklin R. Guenther "Creation of 0.10-cm^-1 resolution quantitative infrared spectral libraries for gas samples", Proc. SPIE 4577, Vibrational Spectroscopy-based Sensor Systems, (22 February 2002); https://doi.org/10.1117/12.455730

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