Approximation to True Peak Absorbance from Observed Peak Absorbance for Gas PhaseFourier Transform Spectroscopy

摘要

An approximation is developed to yield true peak absorbance, A sub p, fromobserved peak absorbance, A sub obs, from gas phase infrared spectra obtained using low resolution Fourier transform spectroscopy employing triangular apodization of the interferogram. The approximation is of the form A sub p = k((A sub obs) ot the l power)(rho to the n power), where k, 1, and n constants and rho is equal to the ratio of the resolution of the instrument to twice the half width at half height of the absorbing line. Values of k, 1, and n are given as a function of A sub p and instrument resolution. Comparison is made with a previous approximation. Keywords: Peak absorbance correction, Gas phase, Low resolution, Absorption. (JHD)