The PolySense team has just published a new article on Sensors and Actuators B Chemical Journal Elsevier (IF 9.221) reporting on a on a 19-inches 6U-rack sensing system based on quartz-enhanced photoacoustic spectroscopy for simultaneous detection of methane, nitrous oxide, and ammonia in atmosphere. The system embeds two detection modules, each one equipped with a quantum cascade laser as light source and a spectrophone composed of a T-shaped quartz tuning fork coupled with acoustic resonator tubes. At 0.1 s signal integration time, detection limits of 28 ppb, 9 ppb, and 6 ppb were obtained for CH4, N2O, and NH3, respectively. As proof of concept, the QEPAS sensor was tested by continuously sampling indoor laboratory air and monitoring the analytes concentrations.
The following link provides access to the article:
http://polysense.poliba.it/wp-content/uploads/2022/11/149_Ch4-N2-NH3-QEPAS_2022.pdf
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