title: [Study on UV-visible DOAS system based on photodiode array (PDA)].
abstract: 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.
authors.affiliation: Environmental Optics Center, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: Min
authors.initials: M
authors.lastname: Qin
authors.forename: Pin-hua
authors.initials: PH
authors.lastname: Xie
authors.forename: Jian-guo
authors.initials: JG
authors.lastname: Liu
authors.forename: Wen-qing
authors.initials: WQ
authors.lastname: Liu
authors.forename: Wu
authors.initials: W
authors.lastname: Fang
authors.forename: Fan
authors.initials: F
authors.lastname: Lu
authors.forename: Ang
authors.initials: A
authors.lastname: Li
authors.forename: Yi-huai
authors.initials: YH
authors.lastname: Lu
authors.forename: Qing-nong
authors.initials: QN
authors.lastname: Wei
authors.forename: Ke
authors.initials: K
authors.lastname: Dou
mesh_terms: 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
chemical_list: D005740:Gases; D013458:Sulfur Dioxide; D009585:Nitrogen Dioxide