Chemical amplification enhanced measurements of peroxy radicals by photoacoustic spectroscopy

Gaoxuan Wang; Ahmad Lahib; Ahmad Lahib; Marius Duncianu; Qian Gou; Philip S. Stevens; Philip S. Stevens; Sébastien Dusanter; Alexandre Tomas; Markus W. Sigrist; Weidong Chen

doi:10.1364/ES.2021.ETh1A.2

OSA Optical Sensors and Sensing Congress 2021 (AIS, FTS, HISE, SENSORS, ES)
OSA Technical Digest (Optica Publishing Group, 2021),
paper ETh1A.2
•https://doi.org/10.1364/ES.2021.ETh1A.2

Chemical amplification enhanced measurements of peroxy radicals by photoacoustic spectroscopy

Gaoxuan Wang, Ahmad Lahib, Marius Duncianu, Qian Gou, Philip S. Stevens, Sébastien Dusanter, Alexandre Tomas, Markus W. Sigrist, and Weidong Chen

Optics and Photonics for Sensing the Environment 2021

Washington, DC United States
19–23 July 2021
ISBN: 978-1-943580-90-3

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G. Wang, A. Lahib, M. Duncianu, Q. Gou, P. S. Stevens, S. Dusanter, A. Tomas, M. W. Sigrist, and W. Chen, "Chemical amplification enhanced measurements of peroxy radicals by photoacoustic spectroscopy," in OSA Optical Sensors and Sensing Congress 2021 (AIS, FTS, HISE, SENSORS, ES), S. Buckley, F. Vanier, S. Shi, K. Walker, I. Coddington, S. Paine, K. Lok Chan, W. Moses, S. Qian, P. Pellegrino, F. Vollmer, G. , J. Jágerská, R. Menzies, L. Emmenegger, and J. Westberg, eds., OSA Technical Digest (Optica Publishing Group, 2021), paper ETh1A.2.

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Abstract

A novel approach for the measurements of peroxy radicals is demonstrated which relies on chemical amplification enhanced photoacoustic spectroscopy detection after chemical conversion of peroxy radicals into NO₂. A 1-σ limit of detection of about 12 pptv for peroxy radicals was achieved in an integration time of 90 s at a relative humidity of about 9.8%.

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