A new method of spectral subtraction for gas-phase Fourier transform infrared (FT-IR) spectra was developed for long-path gas measurements. The method is based on minimization of the length of the spectrum that results from subtracting the spectrum of an individual component of a gas
mixture (water, CO2, etc.) from the experimental spectrum of the mixture. For this purpose a subtraction coefficient (kmin) is found for which the length of the resulting spectrum is minimized. A mathematical simulation with two Lorentzian absorption bands was
conducted and the limits of application for the proposed method were determined. Two experimental examples demonstrate that a successful result could be achieved in the case when the subtrahend spectrum contains a number of narrow absorption bands (such as the spectrum of water vapor).
Boreskov Institute of Catalysis, Novosibirsk 630090, Russian Federation. firstname.lastname@example.org 2:
Boreskov Institute of Catalysis, Novosibirsk 630090, Russian Federation
Publication date: August 1, 2011
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The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)