Beat frequency quartz-enhanced photoacoustic spectroscopy for fast and calibration-free continuous trace-gas monitoring [PDF]
Nature Communications, 2017 Quartz-enhanced photoacoustic spectroscopy is a sensitive gas detection method whereby radiation-induced sound waves from gas absorption are detected. Here, Wuet al. use the beat frequency between a modulated laser and a tuning fork resonance to increase
Hongpeng Wu +9 more
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Quartz Enhanced Photoacoustic Spectroscopy Based Trace Gas Sensors Using Different Quartz Tuning Forks [PDF]
Sensors, 2015 A sensitive trace gas sensor platform based on quartz-enhanced photoacoustic spectroscopy (QEPAS) is reported. A 1.395 μm continuous wave (CW), distributed feedback pigtailed diode laser was used as the excitation source and H2O was selected as the ...
Yufei Ma +5 more
doaj +2 more sources
Extensions of quartz-enhanced photoacoustic spectroscopy [PDF]
, 2009 The goal of this thesis was to perform quartz-enhanced photoacoustic spectroscopy (QEPAS) on trace concentrations of NH3 in the 1.53 pm region with a DFB laser without the use of a resonating cavity. I analyzed the process of QEPAS both analytically and experimentally.
Masurkar, Amrita V
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Quartz-enhanced photoacoustic spectroscopy
, 2007 Methods and apparatus for detecting photoacoustic signals in fluid media are described. The present invention differs from conventional photoacoustic spectroscopy in that rather than accumulating the absorbed energy in the fluid of a sample cell, the ...
Kosterev, Anatoliy A.
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Quartz-Enhanced Photoacoustic Spectroscopy Exploiting Low-Frequency Tuning Forks as a Tool to Measure the Vibrational Relaxation Rate in Gas Species [PDF]
Photoacoustics, 2021 Lei Dong +2 more
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Multivariate spectral analysis in quartz-enhanced photoacoustic spectroscopy
Quantum Sensing and Nano Electronics and Photonics XIX, 2023 Here we report on the application of multivariate analysis on optical sensors for gas detection based on Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) technique, focused on the analysis of complex gas mixtures. In real-world applications the effects
Andrea Zifarelli +5 more
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Quartz-enhanced photoacoustic spectroscopy [PDF]
Optics Letters, 2002 A new approach to detecting a weak photoacoustic signal in a gas medium is described. Instead of a gas-filled resonant acoustic cavity, the sound energy is accumulated in a high- Q crystal element. Feasibility experiments utilizing a quartz-watch tuning fork demonstrate a sensitivity of 1.2x10(-7) cm(-1) W/ radicalHz .
A A, Kosterev +3 more
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Recent Advances in QEPAS and QEPTS Based Trace Gas Sensing: A Review
Frontiers in Physics, 2020 This invited review paper summarizes and discusses developments of QTF based state-of-the-art quartz-enhanced photoacoustic spectroscopy (QEPAS) and quartz-enhanced photothermal spectroscopy (QEPTS) gas sensing techniques over the past 3 years.
Yufei Ma
doaj +1 more source
Impact of Humidity on Quartz-Enhanced Photoacoustic Spectroscopy Based CO Detection Using a Near-IR Telecommunication Diode Laser [PDF]
Sensors, 2016 Lei Zhang, Lei Dong, Huadan Zheng
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, 2023 Helmholtz-resonator quartz-enhanced photoacoustic ...
Zhifei Yang (14613332) +9 more
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