15 December 1998 Different methods of evaluating sharp-peaked compounds in FTIR spectra using benzene as an example
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Abstract
The quantification of benzene in FTIR spectra is restricted by the interference of benzene with carbon dioxide. In this paper different methods are presented to overcome these problems with a detector of medium resolution of 0.5 cm-1. The experiments were performed either in a 10 m gas cell or as open path experiments. One method compares the peak at 673.76 cm-1 with the strongest absorption band of benzene in the single beam spectrum to the neighboring peaks, one method analyzes the shape of the peak at 674 cm-1. Another method works with an artificial background and the latest methods analyze the absorbance spectrum and serve as a reference. The results from all these methods agreed very well down to the level of 30 to 50 ppb.
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Bernhard Lechner, Peter J. Sturm, "Different methods of evaluating sharp-peaked compounds in FTIR spectra using benzene as an example", Proc. SPIE 3493, Spectroscopic Atmospheric Environmental Monitoring Techniques, (15 December 1998); doi: 10.1117/12.332639; https://doi.org/10.1117/12.332639
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