Selective Detection of Hazardous Indoor VOCs Using Metal Oxide Gas Sensors

摘要: Abstract A strategy for detecting and identifying trace levels of hazardous volatile organic compounds (VOCs) in indoor air is presented. metal oxide semiconductor gas sensor temperature cycled operation used to detect formaldehyde, benzene naphthalene ppb sub-ppb concentrations with a varying background ethanol up 2 ppm. Measurement results from laboratory device have been compared an integrated system designed use field tests. We found that emissions the itself are important issue. The identified quantified using analytical methods order derive design rules proper test system. However, show selective detection VOCs range possible even intensive various VOCs, although sensitivity reduced ideal case.