Email this article Sensitive Detection of Ammonia Based on Quartz-Enhanced Photoacoustic Spectroscopy
- Authors: Dang H.1, Ma Y.1,2, Liu F.1, Lu J.3
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Affiliations:
- Shanxi Engineering Research Center of Controllable Neutron Sources School of Science, Xijing University
- National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of Technology
- Xi’an Guanneng Neutron Detection Technology Co., Ltd.
- Issue: Vol 40, No 3 (2019)
- Pages: 265-268
- Section: Article
- URL: https://journal-vniispk.ru/1071-2836/article/view/248755
- DOI: https://doi.org/10.1007/s10946-019-09800-9
- ID: 248755
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Abstract
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.
About the authors
Hongtao Dang
Shanxi Engineering Research Center of Controllable Neutron Sources School of Science, Xijing University
Email: mayufei926@163.com
China, Xi’an, 710123
Yufei Ma
Shanxi Engineering Research Center of Controllable Neutron Sources School of Science, Xijing University; National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of Technology
Author for correspondence.
Email: mayufei926@163.com
China, Xi’an, 710123; Harbin, 150001
Fuhua Liu
Shanxi Engineering Research Center of Controllable Neutron Sources School of Science, Xijing University
Email: mayufei926@163.com
China, Xi’an, 710123
Jie Lu
Xi’an Guanneng Neutron Detection Technology Co., Ltd.
Email: mayufei926@163.com
China, Xi’an, 710123
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