The preliminary results of analyzing the gaseous products of lewisite decomposition in the atmosphere, using the method of subterahertz non-stationary spectroscopy are presented. The retrieval of analytical absorption lines of lewisite and its decomposition products for detecting their vapors in the atmospheric air in the real time mode on the level below maximum permissible concentration is presented.
non-stationary spectroscopy of subterahertz frequency range, lewisite, lewisite oxide, atmospheric air