New Publication on Sensors and Actuators B Chemical Journal

Pubblicato il da Vincenzo Luigi Spagnolo

The PolySense team has just published  a new article on Sensors and Actuators B Chemical Journal Elsevier (IF 8.0)  reporting on a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor for ammonia impurities detection in hydrogen. A quantum cascade laser with a central emission wavelength of 9.062 μm was used to excite the NH3 absorption line at 1103.44 cm−1, with a linestrength of 1.51ꞏ10−19 cm/molecule. A custom-made spectrophone was implemented in a QEPAS sensor, achieving a minimum detection limit of 95 ppb with a lock-in integration time of 0.1 s. Furthermore, the Allan-Werle deviation analysis returned a detection limit as low as 1.5 ppb when for an integration time of 30 s.

The following link provides access to the article:

http://polysense.poliba.it/wp-content/uploads/2025/02/Detection-of-NH3-impurities-in-H2-_SnB-2025.pdf

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