DOI: 10.1016/j.atmosenv.2014.06.052
Scopus记录号: 2-s2.0-84903777368
论文题名: Concentrations of selected volatile organic compounds at kerbside and background sites in central London
作者: Valach A ; C ; , Langford B ; , Nemitz E ; , MacKenzie A ; R ; , Hewitt C ; N
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 95 起始页码: 456
结束页码: 467
语种: 英语
英文关键词: Automatic hydrocarbon network
; ClearfLo
; London
; Mixing ratio
; Proton transfer reaction-mass spectrometer
; Volatile organic compound
Scopus关键词: Benzene
; Gas chromatography
; Hydrocarbons
; Mass spectrometers
; Proton transfer
; ClearfLo
; Flame ionization detectors
; Ground level concentrations
; Intensive observation periods
; Isobaric interferences
; London
; Mixing ratios
; Urban background
; Volatile organic compounds
; acetal
; acetone
; benzene
; cycloalkane
; isoprene
; nitrile
; toluene
; volatile organic compound
; aromatic hydrocarbon
; atmospheric pollution
; carbon monoxide
; concentration (composition)
; data set
; instrumentation
; mass spectrometry
; mixing ratio
; pollutant source
; volatile organic compound
; air sampling
; article
; concentration (parameters)
; gas chromatography
; humidity
; ionization
; kerbside
; limit of detection
; mass spectrometer
; mass spectrometry
; priority journal
; proton transport
; traffic and transport
; United Kingdom
; urban area
; winter
; England
; London [England]
; United Kingdom
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: Ground-level concentrations of nine volatile organic compounds (VOCs) were measured using a proton transfer reaction-mass spectrometer (PTR-MS) in central London at an urban background (North Kensington, NK, during 16th-25th Jan 2012) and a kerbside site (Marylebone Rd, MRd, during 25th Jan-7th Feb 2012) as part of the winter intensive observation period of the ClearfLo project. Site comparisons indicated that VOC concentrations at the urban background site were significantly lower than at the kerbside site (ratio MRd/NK of 2.3). At the kerbside site PTR-MS measurements of aromatics (benzene, toluene, C2- and C3-benzenes) were compared with the gas chromatography - flame ionization detector data from the UK Government's Automatic Hydrocarbon Network. Very good qualitative agreement was observed between the two methods (r=0.90-0.91, p<0.001, N=260), although there was a significant offset between the instruments. This was partly due to issues with humidity dependent background measurements, but possibly also from isobaric interference of other compounds and their fragments, giving a positive bias to the PTR-MS data. Most compounds showed strong indications of traffic-related sources with double rush hour peaks in diurnal profiles and high correlations with known traffic-related compounds (r=0.68-0.97 at NK, 0.48-0.87 at MRd, p<0.001, NNK=2202-2227, NMRd=2705-2720) and CO (r=0.80-0.96 at NK, 0.65-0.84 at MRd, p<0.001, NNK=223, NMRd=256-274). Polar plots agreed with statistical analysis of wind direction dependency and identification of potential emission sources was attempted. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81113
Appears in Collections: 气候变化事实与影响
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作者单位: Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom; Centre for Ecology and Hydrology, Bush Estate, Penicuik, Midlothian, EH26 0QB, United Kingdom; School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
Recommended Citation:
Valach A,C,, Langford B,et al. Concentrations of selected volatile organic compounds at kerbside and background sites in central London[J]. Atmospheric Environment,2014-01-01,95