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Optical Path Length Calibration : A Standard Approach for Use in Absorption Cell-Based IR-Spectrometric Gas Analysis
Joint Authors
Pogány, Andrea
Nwaboh, Javis Anyangwe
Witzel, Oliver
Werhahn, Olav
Ebert, Volker
Source
International Journal of Spectroscopy
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-07-17
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
We employed a comparison method to determine the optical path length of gas cells which can be used in spectroscopic setup based on laser absorption spectroscopy or FTIR.
The method is based on absorption spectroscopy itself.
A reference gas cell, whose length is a priori known and desirably traceable to the international system of units (SI), and a gas mixture are used to calibrate the path length of a cell under test.
By comparing spectra derived from pressure-dependent measurements on the two cells, the path length of the gas cell under test is determined.
The method relies neither on the knowledge of the gas concentration nor on the line strength parameter of the probed transition which is very rarely traceable to the SI and of which the uncertainty is often relatively large.
The method is flexible such that any infrared light source and infrared active molecule with isolated lines can be used.
We elaborate on the method, substantiate the method by reporting results of this calibration procedure applied to multipass and single pass gas cells of lengths from 0.38 m to 21 m, and compare this to other methods.
The relative combined uncertainty of the path length results determined using the comparison method was found to be in the ±0.4% range.
American Psychological Association (APA)
Nwaboh, Javis Anyangwe& Witzel, Oliver& Pogány, Andrea& Werhahn, Olav& Ebert, Volker. 2014. Optical Path Length Calibration : A Standard Approach for Use in Absorption Cell-Based IR-Spectrometric Gas Analysis. International Journal of Spectroscopy،Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-448277
Modern Language Association (MLA)
Nwaboh, Javis Anyangwe…[et al.]. Optical Path Length Calibration : A Standard Approach for Use in Absorption Cell-Based IR-Spectrometric Gas Analysis. International Journal of Spectroscopy No. 2014 (2014), pp.1-9.
https://search.emarefa.net/detail/BIM-448277
American Medical Association (AMA)
Nwaboh, Javis Anyangwe& Witzel, Oliver& Pogány, Andrea& Werhahn, Olav& Ebert, Volker. Optical Path Length Calibration : A Standard Approach for Use in Absorption Cell-Based IR-Spectrometric Gas Analysis. International Journal of Spectroscopy. 2014. Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-448277
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-448277