Qualitative Analysis of the Gas Detection Limit of Fourier Infrared Spectroscopy

The minimum amount that can be detected and quantitatively analyzed by Fourier infrared spectrometer depends on the signal-to-noise ratio of measured gas spectrum. In order to use transform absorption spectroscopy measure CO<sub>2</sub>, CO, CH<sub>4</sub>, N<sub>2</sub>O other greenhouse gases, instrument detection limit mixed are studied. We propose a method calculate through HITRAN simulation addition, we build an experimental platform verify accuracy approximation based spectrum calculation, which serves as actual measurement instrument, also analyze reasons why there appears error between existing optimization scheme their deficiencies well.