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Proceedings Paper

A new type UV-visible DOAS system based on photodiode array (PDA)
Author(s): Min Qin; Pinhua Xie; Jianguo Liu; Wenqing Liu; Wu Fang; Fan Lu; Ang Li; Ke Dou; Shisheng Liu; Qingnong Wei
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Paper Abstract

DOAS technique provides a more representative picture of air quality and typical urban exposures over traditional point monitoring equipments it has been widely used for urban air quality monitoring in China. Most commercial DOAS instruments presently used for air quality monitoring adopt photomultiplier and scanning slit as detector which is called slotted disk (SD) detector. In contrast with the SD detector Photodiode Array can overcome the problem of scintillation noise caused by atmospheric turbulence and reduce photon noise. We report here a new type UV-visible DOAS system based on photodiode array. The properties of the system including offset dark current noise linearity of the detector and resolution stray light ofthe spectrometer are described. Field observations of a number of pollutants (e.g. S02, NO2, 03 and HCHO) were performed in the urban area of Beijing City during August 2004. The measurement results show that the system fulfils automatic ambient air monitoring with high time resolution and sufficient sensitivity.

Paper Details

Date Published: 12 May 2005
PDF: 11 pages
Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); doi: 10.1117/12.619877
Show Author Affiliations
Min Qin, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Pinhua Xie, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Jianguo Liu, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Wenqing Liu, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Wu Fang, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Fan Lu, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Ang Li, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Ke Dou, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Shisheng Liu, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Qingnong Wei, Anhui Institute of Optics and Fine Mechanics, CAS (China)


Published in SPIE Proceedings Vol. 5832:
Optical Technologies for Atmospheric, Ocean, and Environmental Studies
Daren Lu; Gennadii G. Matvienko, Editor(s)

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