Journal of Russian Laser Research

, Volume 40, Issue 3, pp 265–268 | Cite as

Sensitive Detection of Ammonia Based on Quartz-Enhanced Photoacoustic Spectroscopy

  • Hongtao Dang
  • Yufei MaEmail author
  • Fuhua Liu
  • Jie Lu


This letter describes a sensitive quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor for measuring ammonia (NH3) concentrations based on a custom quartz tuning fork (QTF) with a small gap of 200 μm. The signal was enhanced by adding a microresonator (mR) with an optimum length of 5 mm to the bare QTF. Wavelength modulation spectroscopy with second-harmonic detection was adopted to reduce the noise level and simplify the data processing. After optimization of the laser modulation depth, a minimum detection limit of 22.6 ppm was obtained.


quartz-enhanced photoacoustic spectroscopy quartz tuning fork microresonator ammonia 


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Shanxi Engineering Research Center of Controllable Neutron Sources School of ScienceXijing UniversityXi’anChina
  2. 2.National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of TechnologyHarbinChina
  3. 3.Xi’an Guanneng Neutron Detection Technology Co., Ltd.Xi’anChina

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