The PolySense team has just published a new article on Advanced Photonics Research journal reporting on a quartz-enhanced photoacoustic spectroscopy sensor architecture capable ofdetecting eight different air pollutants (CH4,NO2,CO2,N2O, CO, NO, SO2, andNH3) .
Each analyte is targeted using the same sensor components (acoustic detection module, quartz-tuning fork, etc.) and a dedicated laser source. Both interband cascade lasers and quantum cascade lasers are employed totarget a well-resolved and isolated absorption feature from each investigated gas, in a wavelength ranging from 3.35 to 9.06μm.
Minimum detection limits of 40, 13,800, 230, 450, 78, 18, and 5.8 ppb are obtained for CH4,NO2,CO2,N2O, CO,NO, SO2, and NH3, respectively, at 100 ms of integration time.
The following link provides access to the article:
