Temperature-dependent infrared absorption cross sections of methyl cyanide (acetonitrile)

Abstract

Pressure broadened (1 atm. N 2 ) absorption cross sections and integrated band intensities have been derived from laboratory spectra of CH 3 CN , recorded at 276, 298, and 323 K, covering 600– 6500 cm - 1 . The spectra were recorded at a resolution of 0.112 cm - 1 using a commercial Fourier transform spectrometer and a custom flowing sample delivery system. We report integrated absorption cross sections for intervals corresponding to the most prominent bands, compare the results with previously reported values, and discuss error sources, which are estimated as ∼ 7 % with systematic error the largest error source.