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 H2S in the presence of interfering gas components.

Keywords

• sensitivity
• MOX sensor
• temperature modulation
• qualitative analysis
• quantitative analysis