[Study on UV-visible DOAS system based on photodiode array (PDA)].
A long-path differential optical absorption spectroscopy (DOAS) system is introduced. A photodiode array is employed as the detector to replace the complicated SD detector which consists of a PMT and a slotted disk. The properties of the detector and the spectrometer unit such as offset, dark current, noise, linearity, resolution, and wavelength range were measured. This system was also tested to measure SO2 and NO2 in the atmosphere. The detection limits of this system for SO2, and NO2 over a 713 m light path were determined.
Qin
Min
M
Environmental Optics Center, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
Xie
Pin-hua
PH
Liu
Jian-guo
JG
Liu
Wen-qing
WQ
Fang
Wu
W
Lu
Fan
F
Li
Ang
A
Lu
Yi-huai
YH
Wei
Qing-nong
QN
Dou
Ke
K
D000465:Algorithms; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D005740:Gases / Q000032:analysis*; D009585:Nitrogen Dioxide / Q000032:analysis; D015203:Reproducibility of Results; D013053:Spectrophotometry / Q000295:instrumentation / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation / Q000379:methods*; D013458:Sulfur Dioxide / Q000032:analysis
D005740:Gases; D013458:Sulfur Dioxide; D009585:Nitrogen Dioxide