Measurements of NO2, SO2, O3, benzene and toluene using differential optical absorption spectroscopy (DOAS) in Shanghai, China
Measurements of NO2, SO2, O3, benzene and toluene using differential optical absorption spectroscopy (DOAS) in Shanghai, China
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DOI：
10.1002/adic.200690039
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发表时间：
2006-07-01
期刊：
影响因子：
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通讯作者：
Chen, Limin
中科院分区：
文献类型：
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作者：
Hao, Nan;Zhou, Bin;Chen, Limin
2003年6月至8月，采用差分吸收光谱（DOAS）技术对上海桃浦工业园区NO2、SO2、O-3、苯和甲苯进行了测定。 SO2、NO2 和 O-3 的日平均浓度分别为 5.7 ppb 至 40 ppb、22 ppb 至 123 ppb 和 10.6 ppb 至 23 ppb。研究发现 SO2 和 NO2 浓度取决于风向。由于交通排放，NO2浓度日变化有两个峰值。我们对NO2、SO2和O-3的DOAS测量结果与常规测量仪器（API自动监测仪）进行了比较。采用百分比差异 (PD) 的概念和线性回归方法来研究 DOAS 和 API 仪器之间的差异。 PD值与气象参数的相关性分析以及异常偏高的绝对PD值分析表明，较低的能见度导致两个系统之间的兼容性较差。结果表明，两个系统表现出很强的兼容性和良好的相关性，因此DOAS系统能够提供主要空气污染物分布模式的可靠信息。苯和甲苯的平均浓度分别为 1.4 和 8.0 ppb。
NO2, SO2, O-3, benzene, and toluene were measured in Taopu industry park of Shanghai during the period June to August 2003 by differential optical absorption spectroscopy (DOAS) technique. The daily average concentrations of SO2, NO2, and O-3 ranged from 5.7 ppb to 40 ppb, 22 ppb to 123 ppb, and 10.6 ppb to 23 ppb respectively. SO2 and NO2 concentrations were found to depend on wind direction. The diurnal variation of NO2 concentrations had two peaks due to traffic emission. Our DOAS measurements of NO2, SO2 and O-3 were compared with the conventional measurement instruments (API automatic monitoring instrument). The concept of a percent difference (PD) and linear regression methods were employed to study the difference between DOAS and API instruments. The correlation analysis between PD values and meteorological parameters and analysis of abnormal higher absolute PD values indicated that the lower visibility induced the bad compatibility between the two systems. The results showed that both systems exhibited strong compatibility with good correlation, therefore the DOAS system is able to provide reliable information on distribution patterns of major air pollutants. Average benzene and toluene concentrations were 1.4 and 8.0 ppb respectively.