Abstract. The basic principles of terahertz
high resolution spectroscopy on nonstationary effects (free damping
polarization being realized in two modes – phase switching of radiation
influenced on gas and fast frequency sweeping) and types of spectrometers (a
wideband spectrometer, a marker detector for registering certain gases, a two-channel
spectrometer with two independent radiation sources (118-178 GHz, 330-390 GHz)
and one detector) for analysis of multicomponent gas mixtures are considered. The
possibility of using terahertz high resolution spectroscopy in agricultural
applications such as analysis of grain odors for developing the methods of
quality control and diagnostics of grain mycosis degree is considered. The
results of application of terahertz high resolution spectroscopy methods for
investigations of grain odors content are presented.
Key words: high resolution terahertz spectroscopy, phase switching, fast frequency
sweeping, multicomponent gas mixture, grain cultures.
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