Abstract: Online measurement and analysis were taken for PAN and PPN during the 2010 World Expo in Pudong New District, Shanghai. The highest concentration were 5500 pptv and 709 pptv, respectively. PAN was higher in the month of May and June than that in July and August. The diurnal variations for PAN and PPN changed significantly, the lowest concentration occurred at 6:00 and the highest value occurred at 12:00. The ratio between PAN and PPN in July, August and October was lower than that in the other months, indicating that the maganitude of the anthropogenic VOCs declined. Average ratio of daily maximum PAN and O₃ was 0.034 with 93.4% ratio lower than 0.07, which was smaller than the typical urban ratio value.

Key words: online measurement, diurnal variation, PANs, O₃

摘要： 采用在线仪器监测分析2010年上海世博会期间浦东新区监测站大气中的PAN和PPN, 最高浓度分别为5500×10^-12和709×10^-12L/L, 其中PANs在5, 6月份的浓度高于7, 8月份。PAN和PPN日变化显著, 6点出现浓度最低值, 12点出现最高值。PAN与PPN的比值在7, 8, 10月3个月份比值高于其他月份, 表明大气中VOCs人为源的比重有所减少。PAN与O₃日最高浓度比值平均为0.034, 93.4%的PAN与O₃ 的比值在0.07以下, 与典型城市污染地区相比该比值偏小。

关键词: 日变化, PANs, O₃, 在线监测