Quartz-enhanced photoacoustic spectroscopy (QEPAS) and Beat Frequency-QEPAS techniques for air pollutants detection: A comparison in terms of sensitivity and acquisition time

Year: 2023

Type: article

Abstract: In this work, a comparison between Quartz Enhanced Photoacoustic Spectroscopy (QEPAS) and Beat Frequency-QEPAS (BF-QEPAS) techniques for environmental monitoring of pollutants is reported. A spectrophone composed of a T-shaped Quartz Tuning Fork (QTF) coupled with resonator tubes was employed as a detection module. An interband cascade laser has been used as an exciting source, allowing the targeting of two NO absorption features, located at 1900.07 cm−1 and 1900.52 cm−1, and a water vapor absorption feature, located at 1901.76 cm−1. Minimum detection limits of 90 ppb and 180 ppb were achieved with QEPAS and BF-QEPAS techniques, respectively, for NO detection. The capability to detect multiple components in the same gas mixture using BF-QEPAS was also demonstrated.

Source: Photoacoustics

DOI: 10.1016/j.pacs.2023.100479

Authors: Biao Li, Giansergio Menduni, Marilena Giglio, Pietro Patimisco, Angelo Sampaolo, Andrea Zifarelli, Hongpeng Wu, Tingting Wei, Vincenzo Spagnolo, Lei Dong

Institutions: Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, University of Bari Aldo Moro, Polytechnic University of Bari

Language: English

Topic: Spectroscopy and Laser Applications

Subfield: Spectroscopy

Field: Chemistry

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,390

Funders: European Commission, National Natural Science Foundation of China, Ministero dell’Istruzione, dell’Università e della Ricerca, China Scholarship Council, Ministero dell'Università e della Ricerca, Horizon 2020 Framework Programme, HORIZON EUROPE Framework Programme, Horizon 2020, National Key Research and Development Program of China, Science Fund for Distinguished Young Scholars of Tianjin, European Social Fund

OpenAlex ID: W4360604199