| DOI: | 10.1016/j.atmosenv.2015.04.010
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| Scopus记录号: | 2-s2.0-84928344240
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| 论文题名: | Simultaneous open-path determination of road side mono-nitrogen oxides employing mid-IR laser spectroscopy |
| 作者: | Reidl-Leuthner C; , Ofner J; , Tomischko W; , Lohninger H; , Lendl B
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| 刊名: | Atmospheric Environment
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| ISSN: | 0168-2563
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| EISSN: | 1573-515X
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| 出版年: | 2015
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| 卷: | 112 | | 起始页码: | 189
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| 结束页码: | 195
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| 语种: | 英语
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| 英文关键词: | Emission monitoring
; Nitric oxide
; Nitrogen dioxide
; Open-path
; Quantum cascade laser
; Remote sensing
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| Scopus关键词: | Cadmium telluride
; Laser spectroscopy
; Nitric oxide
; Nitrogen
; Nitrogen oxides
; Quantum cascade lasers
; Remote sensing
; Semiconductor lasers
; Distributed feedback
; Emission monitoring
; Mercury cadmium telluride detector
; Nitrogen dioxides
; Open-path
; Optical path lengths
; Real-time information
; Simultaneous determinations
; Pulsed lasers
; accuracy assessment
; atmospheric pollution
; data set
; environmental monitoring
; luminescence
; mathematical analysis
; measurement method
; nitrogen oxides
; optical property
; pollutant source
; remote sensing
; spectral resolution
; vibration
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| Scopus学科分类: | Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
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| 英文摘要: | Within this work we present the application of a new, portable open-path measurement system for the simultaneous determination of NO and NO2 in the atmosphere. The system is based on two pulsed distributed feedback mid-IR quantum cascade laser and a fast thermo-electrically cooled mercury-cadmium-telluride detector. Limits of detection (LoD) below 1μgm-3 are achieved for both analytes during one minute measurement time and using an optical path-length of up to 428m. An accuracy below 10 ngm-3 and a precision below 0.76μgm-3 could be calculated based on minute mean values for 100m path-length. Reducing the measurement time to one second LoDs of approximately 7μgm-3 are obtained. During the 300ns laser pulses micro-spectra for NO and NO2, each of typically 1.2cm-1 width and a spectral resolution of 0.02cm-1, are recorded and evaluated. The chosen rotation-vibrational doublets are located at approximately 1900cm-1 for NO and 1630cm-1 for NO2. The obtained results show good correlation to the reference method based on chemiluminescence. A particular advantage of the new method is that it provides real time information on the existing NO/NO2 ratio in the measured air. This in turn allows distinguishing between the different emission sources and is demonstrated here by data obtained from different vehicles passing close to the measurement path. These events temporally increased the NO and NO2 concentrations at characteristic ratios from the background values. © 2015 . |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/81748
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164 AC, Vienna, Austria
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| Recommended Citation: | |
Reidl-Leuthner C,, Ofner J,, Tomischko W,et al. Simultaneous open-path determination of road side mono-nitrogen oxides employing mid-IR laser spectroscopy[J]. Atmospheric Environment,2015-01-01,112
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