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Proceedings Paper

Filter-free measurements of black carbon absorption using photoacoustic spectroscopy
Author(s): Gaoxuan Wang; Hongming Yi; Patrice Hubert; Alexandre Deguine; Denis Petitprez; Rabih Maamary; Eric Fertein; Julien M. Rey; Markus W. Sigrist; Weidong Chen
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Paper Abstract

A photoacoustic (PA) spectrophone was developed for filter-free measurement of black carbon (BC) mass absorption coefficient (MAC) in the spectral region of ~ 442 nm using a blue diode laser. The PA sensor was characterized and calibrated using NO2 at standard calibrated concentrations, as well as at indoor and outdoor air concentrations via a side-by-side intercomparison with a commercial NOx analyzer. Black carbon (graphite) and volcanic ash samples were measured under laboratory condition. MAC of BC and volcanic ash sample were determined based on the measured particles optical absorption coefficient by the PA spectrophone, in combination with the mass concentration measured using a scanning mobility particle sizer (SMPS). A minimum detectable absorption coefficient (1σ) of ~ 1.2 Mm-1 for BC was achieved with a time solution of 1 second.

Paper Details

Date Published: 27 January 2017
PDF: 7 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 1011136 (27 January 2017); doi: 10.1117/12.2251093
Show Author Affiliations
Gaoxuan Wang, Lab. de Physicochimie de l’Atmosphère, Univ. du Littoral Côte d’Opale (France)
Hongming Yi, Lab. de Physicochimie de l’Atmosphère, Univ. du Littoral Côte d’Opale (France)
Patrice Hubert, Lab. de Physicochimie des Processus de Combustion et de l’Atmosphère Univ. de Lille (France)
Alexandre Deguine, Lab. de Physicochimie des Processus de Combustion et de l’Atmosphère Univ. de Lille (France)
Denis Petitprez, Lab. de Physicochimie des Processus de Combustion et de l’Atmosphère Univ. de Lille (France)
Rabih Maamary, Lab. de Physicochimie de l’Atmosphère, Univ. du Littoral Côte d’Opale (France)
Eric Fertein, Lab. de Physicochimie de l’Atmosphère, Univ. du Littoral Côte d’Opale (France)
Julien M. Rey, ETH Zürich (Switzerland)
Markus W. Sigrist, ETH Zürich (Switzerland)
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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