Monoaromatic compounds in ambient air of various cities: a focus on correlations between the xylenes and ethylbenzene
Monoaromatic compounds in ambient air of various cities: a focus on correlations between the xylenes and ethylbenzene
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DOI：
10.1016/s1352-2310(00)00274-0
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发表时间：
2001-01-01
影响因子：
5
通讯作者：
Rowland, FS
中科院分区：
文献类型：
--
作者：
Monod, A;Sive, BC;Rowland, FS
采用气相色谱法对欧洲、亚洲和南美洲19个城市不同地点的空气和液体燃料样品进行了邻二甲苯、间二甲苯、对二甲苯和乙苯的形态分析。在不同的地点，包括城市空气、交通空气和液体燃料，对二甲苯的混合比例进行了比较。对于所有样品，二甲苯表现出很强的相关性，斜率保持不变。间二甲苯/对二甲苯的比值为2.33 +/- 0.30，间二甲苯/邻二甲苯的比值为1.84 +/- 0.25。即使在生物质燃烧实验中（在南美洲和南非），这些比率仍然存在。将二甲苯与甲苯和苯进行比较表明，在以汽车排放为主的地区，燃烧而不是燃料蒸发是二甲苯的主要常见来源。尽管在所调查的所有地点都遇到了各种各样的燃烧类型和燃烧效率，但二甲苯和乙苯的比率仍然保持不变。我们讨论了二甲苯和乙苯比值的变化对大气化学的影响。(C) 2000 Elsevier Science Ltd.版权所有。
Speciation of o-xylene, m-xylene, p-xylene and ethylbenzene was performed by gas chromatography from ambient air and liquid fuel samples collected at various locations in 19 cities in Europe, Asia and South America. The xylene's mixing ratios were compared to each other from the various locations, which included urban air, traffic air and liquid fuel. For all samples, the xylenes exhibited robust correlations, and the slopes remained constant. The m-xylene/p-xylene ratio was found to be 2.33 +/- 0.30, and the m-xylene/o-xylene ratio was found to be 1.84 +/- 0.25. These ratios remain persistent even in biomass combustion experiments (in South America and South Africa). Comparing the xylenes to toluene and benzene indicate that combustion, but not fuel evaporation, is the major common source of the xylenes in areas dominated by automotive emissions. Although a wide range of combustion types and combustion efficiencies were encountered throughout all the locations investigated, xylenes and ethylbenzene ratios remained persistent. We discuss the implications of the constancies in the xylenes and ethylbenzene ratios on atmospheric chemistry. (C) 2000 Elsevier Science Ltd. All rights reserved.