Filter-free measurements of black carbon absorption using photoacoustic spectroscopy

被引：2

作者：

Wang, Gaoxuan ^{[1
]}

Yi, Hongming ^{[1
,2
]}

Hubert, Patrice ^{[3
]}

Deguine, Alexandre ^{[3
]}

Petitprez, Denis ^{[3
]}

Maamary, Rabih ^{[1
]}

Fertein, Eric ^{[1
]}

Rey, Julien M. ^{[4
]}

Sigrist, Markus W. ^{[4
]}

Chen, Weidong ^{[1
]}

机构：

[1] Univ Littoral Cote dOpale, Lab Physicochim Atmosphere, Dunkerque, France

[2] NIST, Gaithersburg, MD 20899 USA

[3] Univ Lille 1, Lab Physicochim Proc Combust & Atmosphere, Villeneuve Dascq, France

[4] ETH, Inst Quantum Elect, Laser Spect & Sensing Lab, Zurich, Switzerland

来源：

QUANTUM SENSING AND NANO ELECTRONICS AND PHOTONICS XIV | 2017年 / 10111卷

关键词：

Mass absorption coefficient; Photoaoustic spectroscopy; Black carbon; Volcanic ash; blue laser; LIGHT-ABSORPTION; UV;

D O I：

10.1117/12.2251093

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A photoacoustic (PA) spectrophone was developed for filter-free measurement of black carbon (BC) mass absorption coefficient (MAC) in the spectral region of similar to 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 (1 sigma) of similar to 1.2 Mm(-1) for BC was achieved with a time solution of 1 second.

引用

页数：7

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