CO<inf>2</inf>-laser photoacoustic spectroscopy of deuterated and tritiated forms of hydrogen sulphide

Abstract

Spectra of coincidence of HDS and D2S IR absorption with CO2-laser emission lines were recorded by use of photoacoustic detection in the entire range of CO2-laser emission. The strongest absorption of the laser radiation was found at 970.55 cm-1 [laser line R(12)] for HDS and at 974.62 cm-1 [laser line R(18)] for D2S. The exceptional sensitivity of the method was also used for obtaining photoacoustic data on HTS absorption in the CO2-laser emission range with the lowest feasible concentration of 250 ppm HTS in H2S. In this case, the strongest absorptions were found at 1045.02 cm-1 [laser line P(22)] and at 971.93cm-1 [laser line R(14)]. © 1991.