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Proceedings Paper

Monitoring of nitrous acid (HONO) by external-cavity quantum cascade laser-based off-beam quartz-enhanced photoacoustic spectroscopy (QEPAS)
Author(s): Hongming Yi; Rabih Maamary; Xiaoming Gao; Markus W. Sigrist; Eric Fertein; Weidong Chen
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Paper Abstract

In this presentation, we report on the high-sensitivity and high-selectivity measurement of HONO by off-beam quartz-enhanced photoacoustic spectroscopy (QEPAS) in a very small gas sample volume (of ~ 40 mm3) resulting in a ultrashort residence time of less than 10 ms (compared to ~ 7 min for a conventional 210 m multipass cell or ~ 10-min. integration time for currently used chemical analytical instruments). A minimum detection limit of 66 ppbv (1σ) HONO was achieved at 70 mbar using a laser output power of 50 mW and 1 s integration time. This MDL was down to 7 ppbv at the optimal integration time of 150 s.

Paper Details

Date Published: 27 January 2017
PDF: 6 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 1011137 (27 January 2017); doi: 10.1117/12.2251096
Show Author Affiliations
Hongming Yi, Lab. de Physicochimie de l’Atmosphère, Univ. du Littoral Côte d’Opale (France)
Anhui Institute of Optics and Fine Mechanics (China)
Rabih Maamary, Lab. de Physicochimie de l’Atmosphère, Univ. du Littoral Côte d’Opale (France)
Xiaoming Gao, Anhui Institute of Optics and Fine Mechanics (China)
Markus W. Sigrist, ETH Zürich (Switzerland)
Eric Fertein, Lab. de Physicochimie de l’Atmosphère, Univ. du Littoral Côte d’Opale (France)
Weidong Chen, Lab. de Physicochimie de l’Atmosphère, Univ. du Littoral Côte d’Opale (France)


Published in SPIE Proceedings Vol. 10111:
Quantum Sensing and Nano Electronics and Photonics XIV
Manijeh Razeghi, Editor(s)

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