DOI: 10.1016/j.atmosenv.2014.07.016
Scopus记录号: 2-s2.0-84904089650
论文题名: Development and deployment of a cavity enhanced UV-LED spectrometer for measurements of atmospheric HONO and NO2 in Hong Kong
作者: Wu T ; , Zha Q ; , Chen W ; , Xu Z ; , Wang T ; , He X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 95 起始页码: 544
结束页码: 551
语种: 英语
英文关键词: Broadband cavity enhanced spectroscopy
; HONO detection
; LOPAP
Scopus关键词: Atmospheric chemistry
; Light emitting diodes
; Nitrogen oxides
; Atmospheric environment
; Broadband cavity-enhanced absorption spectroscopies
; Cavity enhanced spectroscopy
; LOPAP
; Measurement instruments
; Quantitative assessments
; Simultaneous measurement
; Spectral interference
; Measurements
; nitrogen dioxide
; nitrous acid
; ambient air
; atmospheric pollution
; atomic absorption spectroscopy
; nitric acid
; nitrogen oxides
; suburban area
; ultraviolet radiation
; absorption spectroscopy
; article
; atmospheric transport
; concentration (parameters)
; correlation analysis
; Hong Kong
; incoherent broadband cavity enhanced absorption spectroscopy
; light emitting diode
; limit of detection
; measurement accuracy
; nitric oxide analyzer
; priority journal
; quantitative analysis
; signal noise ratio
; spectrometer
; suburban area
; ultraviolet spectroscopy
; China
; Hong Kong
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: An optical analytical instrument based on light emitting diode (LED) incoherent broadband cavity enhanced absorption spectroscopy (LED-IBBCEAS) was developed for simultaneous measurements of HONO and NO2 in ambient air. Detection limits (for signal-to-noise ratio, SNR=2) of 0.6ppbv for HONO and 2ppbv for NO2 were achieved with an optimum acquisition time of 120s. Field intercomparison campaign at a suburban site of Tung Chung in Hong Kong was carried out. Daytime and nighttime concentrations of HONO and NO2 were recorded and compared with data from a long path absorption photometer (LOPAP) and a NOx analyzer equipped with a blue light converter. The test of such a LED-IBBCEAS setup by the measurement intercomparison with the well established HONO and NO2 measurement instruments, for the first time, in a real atmospheric environment, demonstrated the feasibility of the proposed technique for the measurement of environmental HONO and NO2 concentrations in a manner that is free of chemical and spectral interference. During the measurement period from 12:32 on May 12th to 12:32 on May 14th, 2012, the quantitative assessments from these techniques showed well agreed data. High temporal correlations of HONO with NOx and CO were observed, and possible formation sources of HONO are discussed. Occasional inconsistencies in the quantitative assessment of HONO were observed during the in-field campaign. The problems encountered by the IBBCEAS technique applied to field observation and the further improvements are discussed. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80985
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Nondestructive Test (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China; Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong, China; Laboratoire de Physicochimie de l'Atmosphère, Université du Littoral CÔte d'Opale, 189A, Av. Maurice Schumann, 59140 Dunkerque, France
Recommended Citation:
Wu T,, Zha Q,, Chen W,et al. Development and deployment of a cavity enhanced UV-LED spectrometer for measurements of atmospheric HONO and NO2 in Hong Kong[J]. Atmospheric Environment,2014-01-01,95