Detection of ammonia in human breath using quartz crystal microbalance sensors with functionalized mesoporous SiO2 nanoparticle films

- Two QCM electrode-based system for breath ammonia detection.
- Porous film structure composed of SiO2 nanoparticles and PAH for PAA infusion for ammonia sensor at varied RH.
- Humidity independent detection of pathological breath ammonia.
- Simple experiment and data analysis, no need for extra RH control.