Selective determination of hydrogen sulfide using SnO2–Ag sensor working in non-stationary temperature regime

Abstract

The application of a non-stationary regime of temperature modulation in metal oxide semiconductor sensor based on SnO2 –Ag leads not only to a strongly increased sensor response, but also to a considerably improved sensor selectivity toward hydrogen sulfide. Selectivity with respect to other reducing gases (CO, NH3, H2) is about five orders of magnitude, enabling a correct selective determination of H2 S in the presence of interfering gas components.