C1 to C9 volatile organic compound measurements in urban air.
C1 to C9 volatile organic compound measurements in urban air.
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DOI：
10.1016/j.scitotenv.2004.04.037
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发表时间：
2004-12
期刊：
影响因子：
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通讯作者：
V. Fernández-Villarrenaga;P. López‐Mahía;S. Muniategui-Lorenzo;D. Prada-Rodríguez;E. Fernández-Fernández-E.-Fernández-Fernández-1440664914;X. Tomàs
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文献类型：
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作者：
V. Fernández-Villarrenaga;P. López‐Mahía;S. Muniategui-Lorenzo;D. Prada-Rodríguez;E. Fernández-Fernández-E.-Fernández-Fernández-1440664914;X. Tomàs
在A Coruña（西班牙西北部）收集了城市大气样本，并分析了挥发性有机化合物。2000年冬季采集了121个小时样本。环境空气中苯、甲苯、乙苯和二甲苯（BTEX）含量较高，尤其是甲苯（平均值23.6 μ m−3，中位数14.66 μ m−3），但氯代化合物的存在也很明显。记录到高浓度的1,4-二氯苯（平均值：11.4 μg m - 3，最大值：90.4 μg m - 3）。采用多变量分析方法对VOC、微量气体（NOx、NO2、NO、so2和O3）和气象变量（温度、风向和风速、降水和辐射）进行分析，并研究VOC与气象变量之间的相关性。主成分分析和相关分析证实交通是该地区VOC的主要来源，尽管蒸发源的重要性也得到了体现。聚类分析得到三组样本；这些基团的形成取决于芳烃和臭氧的含量，在许多情况下，取决于采样时间。
Urban atmospheric samples were collected in A Coruña (NW Spain) and analysed for volatile organic compounds. One hundred and twenty one hour samples were collected in winter 2000. The ambient air was rich in benzene, toluene, ethyl-benzene and xylenes (BTEX) and especially toluene (mean: 23.6 μg m−3, median: 14.66 μg m−3), but the presence of chlorinated compounds was also notable. High concentrations of 1,4-dichlorobenzene (mean: 11.4 μg m−3, max: 90.4 μg m−3) were recorded. Multivariate analysis of VOC, trace gases (NOx, NO2, NO, SO2and O3) and meteorological variables (temperature, wind direction and speed, precipitation and radiation) was applied and correlations between VOC were also studied. Principal component analysis and correlation analysis confirm traffic as the main source of VOC in the area, although the importance of evaporative sources is also reflected. Three groups of samples were obtained by cluster analysis; these groups are formed depending on the content of aromatics and ozone and, in many cases, on the sampling hour.