scholarly journals Selective Determination of Hydrogen Sulfide Using SnO2–Ag Sensor Working in Non-Stationary Temperature Regime

Chemosensors ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 203
Author(s):  
Alexey V. Shaposhnik ◽  
Pavel V. Moskalev ◽  
Alexey A. Zviagin ◽  
Margarita V. Duykova ◽  
Stanislav V. Ryabtsev ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Stationary Regime ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Temperature Modulation ◽  
Selective Determination ◽  
Semiconductor Sensor ◽  
Reducing Gases ◽  
Metal Oxide Semiconductor Sensor

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.

scholarly journals Cocaine by-product detection with metal oxide semiconductor sensor arrays

RSC Advances ◽  
2020 ◽  
Vol 10 (47) ◽  
pp. 28464-28477
Author(s):  
Paula Tarttelin Hernández ◽  
Stephen M. V. Hailes ◽  
Ivan P. Parkin
Keyword(s):  
Metal Oxide ◽  
Gas Sensors ◽  
Sensor Array ◽  
Sensor Arrays ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Semiconductor Sensor ◽  
Gas Sensor Array ◽  
Semiconductor Gas Sensors ◽  
Metal Oxide Semiconductor Sensor

Metal oxide semiconductor gas sensors based on SnO2 and Cr2O3 were modified with zeolites H-ZSM-5, Na-A and H–Y to create a gas sensor array to detect cocaine by-product, methyl benzoate. SVMs were later used with a 4 sensor array to classify 9 gases of interest.

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