The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 5.87) reporting on a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor for hydrogen sulfide (H2S) detection, exploiting a liquid-nitrogen-cooled THz quantum cascade laser (QCL) operating in pulsed mode. A QEPAS record sensitivity for H2S detection in the THz range of 360 part-per-billion in volume was achieved at a gas pressure of 60 Torr and 10 s integration time.
The following link provide access to the article.
http://polysense.poliba.it/wp-content/uploads/2020/12/125_H2S-THz_2020.pdf
