Dispersive far-infrared Fourier transform spectrometer

Details Dispersive far-infrared Fourier transform spectrometer Dispersive far-infrared Fourier transform spectrometer

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2089..294c&link_type=abstract

Proc. SPIE Vol. 2089, p. 294-295, 9th International Conference on Fourier Transform Spectroscopy, John E. Bertie; Hal Wieser; Ed

Computer Science

Scientific paper

Two Mercury Cadmium Telluride (MCT) detectors have been evaluated for open-path Fourier transform infrared (FT-IR) spectrometry. The first detector was equipped with a standard manufacturers preamplifier; the second detector was equipped with a `linearizing' preamplifier. The two detectors and their respective preamplification systems were evaluated at varied light levels and open-path distances. Chloroform was chosen as an analyte of comparison because it has absorption frequencies at 1220 and 772 cm-1. These two frequencies allow for the visualization of non-linear absorption characteristics. Toluene monitored from a process stack also demonstrates this non-linearity. These data dramatically exhibit the need for a linear detection system in qualitative and quantitative infrared spectrometry.

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