Application of a Static IR Fourier Spectrometer for Recording Chemical Compounds in an Open Atmosphere

Abstract

The remote detection, identification, and determination of the presence of pollutants in an open atmosphere is one of the most important tasks of infrared (IR) spectroscopy. To solve this problem, it is proposed to use static IR-Fourier spectrometers, which, due to the absence of movable elements, are stable and small. The developed and created experimental layout of a static Fourier transform spectrometer (sFTS) for recording and analyzing gaseous compounds is described in this paper. To test the performance of the model, experiments are carried out to record and restore the IR absorption spectra of a test film simulator (lavsan) of the tested substances (methanol, ammonia) in the gas phase at a temperature contrast of 20°C and natural tests on an open route at a temperature contrast of 5 to 10°C. The results obtained confirm the possibility of using the developed sFTS layout for recording IR absorption spectra of chemical compounds in an open atmosphere.