Determination of volatile organic compounds in urban and industrial air from Tarragona by thermal desorption and gas chromatography–mass spectrometry

Ras-Mallorquí, Maria Rosa; Marcé, Rosa Maria; Borrull, Francesc

doi:10.1016/j.talanta.2006.12.025

Cited by 70 publications

(50 citation statements)

References 18 publications

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“…These two typical patterns have also been reported in previous studies Table 1 A statistical summary of BTEX, CO and meteorological parameters measured during daytime (from 6:00 to 20:00) in the sampling site (from 20 July to 20 October, 2008). conducted in the urban atmosphere (Singh et al, 1985;Chan et al, 2002;Gros et al, 2007;Barletta et al, 2008;Xie et al, 2008;Derwent et al, 1995;Lee et al, 2002;Na et al, 2003;Hellén et al, 2003;Ho et al, 2004;Ras-Mallorquí et al, 2007;Song et al, 2007). As mentioned above, the measured xylene concentrations strongly depended on the concentration of atmospheric OH radicals, and thus the two different patterns might be partially due to the difference of photochemical reaction activity during the two periods.…”

Section: Time Series and Composition Pattern Of Btexmentioning

confidence: 90%

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Atmospheric levels of BTEX compounds during the 2008 Olympic Games in the urban area of Beijing

Liu

Zhang

et al. 2009

Science of The Total Environment

113

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Section: Time Series and Composition Pattern Of Btexmentioning

confidence: 90%

“…(Liu et al, 2005;Lu et al, 2007;Song et al, 2007). BTEX have become the most abundant component of volatile organic compounds (VOCs) in the atmosphere of most urban areas, and their negative impacts on environmental and public health have already triggered general concern (Mehlman, 1990;Lee et al, 2002;Ras-Mallorquí et al, 2007).…”

mentioning

confidence: 99%

Atmospheric levels of BTEX compounds during the 2008 Olympic Games in the urban area of Beijing

Liu

Zhang

et al. 2009

Science of The Total Environment

113

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“…By properly selecting single or multiple sorbents, a wide variety of VOCs can be quantitatively adsorbed and enriched. 8,9 Due to the advantages of great sampling versatility, high concentration capacity, and ease of use, the method has been preferentially applied in the determination of VOCs in the lower troposphere, 10 rural and urban areas, [11][12][13][14] and indoor environments.…”

Section: -7mentioning

confidence: 99%

A cryogen-free refrigerating preconcentration device for the measurement of C2 to C4 hydrocarbons in ambient air

Peng

Wang

Shen

et al. 2011

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A cryogen-free refrigerating preconcentration device for the enrichment of trace amounts of highly volatile organic compounds in the atmosphere prior to analysis has been designed and evaluated. The device consists of a microtrap housed in an insulated box, which is cooled by a conventional refrigeration unit. Experimental parameters, including adsorbent mass, trapping temperature, and thermal desorption temperature, were optimized. The on-line coupling of the device to a GC allows sufficient enrichment and separation of C2 to C4 hydrocarbons in less than 40 min without a second cryotrap. The target compounds analysis showed good linearity (correlation coefficients >0.99) and repeatability (relative standard deviation <5%). Detection limits for the 10 volatile organic compounds ranged from 14 ppt to 52 ppt, under the conditions of a 500 mL sampling volume and À10 C trapping temperature. Real air sample measurements were conducted at an urban site, and five VOCs including ethane, ethene, propane, propene and 1-butene were detected and quantified.

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“…Some compounds, such as BTEX, are precursors of ground level ozone and are also harmful to human health. Benzene is known for its carcinogenic effect [1] and xylenes' oxidation products may be toxic or mutagenic, such as aromatic aldehydes and secondary organic aerosols [2]. BTEX are characteristic of fossil emissions and are reported as indicators of intense vehicular activity, corresponding to 60% of total non-methane VOC [3].…”

Section: Introductionmentioning

confidence: 99%

BTEX concentrations in the atmosphere of the metropolitan area of Campinas (São Paulo, Brazil)

Ueda

Tomaz

2011

WIT Transactions on Ecology and the Environment

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Benzene, toluene, ethylbenzene and xylenes (BTEX) are hydrocarbons present in fossil fuels and, consequently, are also present in fuel combustion emissions, as toxic organic volatile compounds. Concentrations of these compounds found in the atmosphere of urban regions are indicative of vehicular pollution. In this work were studied BTEX atmospheric concentrations from five sites of metropolitan area of Campinas (São Paulo, Brazil), which have different characteristics: (1) suburban site; (2) downtown site; (3) urban site A; (4) urban site B; (5) industrial. The most abundant compound found in all sites was toluene (2.4 -10 μg m -3 ). B/T ratio was used to study predominance of vehicular emissions and X/E indicates the distance from the site to the sources due to different photochemical reactivity of the compounds. It was possible to observe that sites away from the urban region and located in the predominant wind direction have lower concentration of BTEX as well as lower X/E ratios, indicating that pollution is due to transport emissions.

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Determination of volatile organic compounds in urban and industrial air from Tarragona by thermal desorption and gas chromatography–mass spectrometry

Cited by 70 publications

References 18 publications

Atmospheric levels of BTEX compounds during the 2008 Olympic Games in the urban area of Beijing

Atmospheric levels of BTEX compounds during the 2008 Olympic Games in the urban area of Beijing

A cryogen-free refrigerating preconcentration device for the measurement of C2 to C4 hydrocarbons in ambient air

BTEX concentrations in the atmosphere of the metropolitan area of Campinas (São Paulo, Brazil)

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