Microfluidic breath analyzer for detection of cannabis use in human breath

Project Grouping: Gas Detection

Description


Detection of Tetrahydrocannabinol (THC) in breath has been used as an indicator of cannabis use. However, as there are traces of other volatile organic compounds (VOCs) in the breath, it is important to differentiate among different gases, and pinpoint the distinct “smell print” of THC. The general purpose Metal Oxide Semiconductor (MOS) gas sensors are sensitive and not selective to different gases. Micro-channels can be integrated with these sensors to enhance their selectively. However, these microfluidic gas sensors are not suitable for detection of large molecule gases (such as THC) as the diffusion process is slow and takes more than few minutes. In this project, a reliable and portable microfluidic-based breath analyzer for detection of cannabis in human exhaled breath is developed. The developed miniaturized device is capable of differentiating small concentrations of THC in the presence of other VOCs. This will be achieved through following objectives:
Smart Sewers: Detection of Nuisance Gases Dissolved in Liquid Waste

Project Grouping: Gas Detection

Description


Biogenic acid corrosion is of particular concern; biological processes can create strong acids from hydrogen sulfide which drastically reduce the lifespan of the LWS infrastructure and increase the risk of sewer pipe collapse. A variety of mitigation treatments are used to control and prevent the production of nuisance gases and their related consequences. However, the chemicals used for these treatments are expensive and require targeting specific "hotspots" of biogenic gas to increase cost-effectiveness. Since gas production occurs within the liquid-phase of sewer pipes, there has been an expressed need for a detector capable of being situated along the pipeline over extended periods. This industry problem will be addressed in the following research objectives: