THE PRELIMINARY STUDY ON MEASURED RESULTS OF AMBIENT VHCs IN BEIJING AREAS

Wang Mulin; Cheng Hong bing; Ding Guoan

Vol.16, NO.5, 2005

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Article Navigation > Journal of Applied Meteorological Science > 2005 > 16(5): 600-607

Wang Mulin, Cheng Hong bing, Ding Guoan. The preliminary study on measured results of ambient VHCs in Beijing areas. J Appl Meteor Sci, 2005, 16(5): 600-607.

Citation:

Wang Mulin, Cheng Hong bing, Ding Guoan. The preliminary study on measured results of ambient VHCs in Beijing areas. J Appl Meteor Sci, 2005, 16(5): 600-607.

Wang Mulin, Cheng Hong bing, Ding Guoan. The preliminary study on measured results of ambient VHCs in Beijing areas. J Appl Meteor Sci, 2005, 16(5): 600-607.

Citation:

Wang Mulin, Cheng Hong bing, Ding Guoan. The preliminary study on measured results of ambient VHCs in Beijing areas. J Appl Meteor Sci, 2005, 16(5): 600-607.

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THE PRELIMINARY STUDY ON MEASURED RESULTS OF AMBIENT VHCs IN BEIJING AREAS

(Key Laboratory for Atmospheric Chemistry, Center for Atmosphere Watch and Services,Chinese Academy of Meteorological Sciences, CMA, Beijing100081)

Received Date: 2005-01-14
Rev Recd Date: 2005-03-07
Publish Date: 2005-10-31

Abstract

Abstract

The variation of atmospheric concentration of C2～C10 volatile hydrocarbon compounds (VHCs)is measured out in Beijing areas using Tenax TA and Carbosieve sorption-thermodesso rption-capillary gas chromatography.113 samples are collected during the period of September 2001 to August 2003.55 VHCs species are detected including 26 alkanes, 19 alkenes and 10 aromatics.The average mass concentration of VHCs is 364.3 ±99.3 μg/m³. The seasonal peak value is 546.9 ±353.5 μg/m³w hich appears in autumn.The valley value appears in summer which is 251.8 ±152.4 μg/m³.The VHCs average concentration is 30% in the heating season more than that in the non-heating season.The average concentration in the urban area is 10% higher than that in the suburbs.There are the significant daily variations of VHCs in Beijing.Results show that the polluted levels of ambient air depended mainly on the vehicle emissions and the meteorological conditions.
- Thermal desorption;
- Capillary gas chromatography;
- Volatile hydrocarbon compounds;
- Special and temporal distribution

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References(24)

Figures and Tables

图 1 TVHCs浓度的日变化

(a)第一类,(b)第二类,(c)第三类

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图 2 分子大小不同的VHCs的变化

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图 3 苯系物(BTEX)平均浓度的变化特征

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表 1 VHCs组分的平均浓度与检出率

表 2 VHCs中烷、烯、芳香烃及BTEX的平均浓度

表 3 分子中含碳原子数相同的TVHCs的平均浓度

表 4 与国内外著名大城市苯系物(BTEX)浓度的比较

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