Zhang Ya-Fei, Ma Yan, Qi Lu, Wang Zhen, Wang Li-Peng, Zhu Lin
School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China.
Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China.
Huan Jing Ke Xue. 2016 Jul 8;37(7):2436-2442. doi: 10.13227/j.hjkx.2016.07.004.
Atmospheric particulate samples of PM were collected from the northern suburb of Nanjing in December, 2014, and a LC-MS method was optimized for the determination of aromatic acids in PM; The concentrations of major water-soluble ions, organic carbon and elemental carbon were also determined. The quantification results showed that the average total concentration of five aromatic acids we have determined was (50.01±16.05) ng·m, and the average concentrations of terephthalic acid, phthalic acid, trimellitic acid, 4-methylphthalic acid and iso-phthalic acid were (34.54±12.79)、(8.14±3.34)、(2.27±1.39)、(1.68±0.77) and (1.08±0.43) ng·m, respectively. The different source apportionments of atmospheric particulate were analyzed by principal component analysis/absolute principal component scores (PCA/APCS) receptor model. The results of source apportionment showed that the main sources of Phthalic acid, Trimellitic acid and 4-methylphthalic acid were mainly secondary transformation, and primary emissions such as vehicle exhaust contributed less to Trimellitic acid; Secondary transformation and biomass burning made the most significant contributions to iso-Phthalic acid and vehicle exhaust contributed less; The sources of Terephthalic acid were primary emissions such as biomass burning and vehicle exhaust.
2014年12月在南京北郊采集了大气颗粒物PM样本，并优化了一种液相色谱-质谱法用于测定PM中的芳香酸；同时还测定了主要水溶性离子、有机碳和元素碳的浓度。定量结果表明，所测定的5种芳香酸的平均总浓度为(50.01±16.05) ng·m，对苯二甲酸、邻苯二甲酸、偏苯三甲酸、4-甲基邻苯二甲酸和间苯二甲酸的平均浓度分别为(34.54±12.79)、(8.14±3.34)、(2.27±1.39)、(1.68±0.77)和(1.08±0.43) ng·m。采用主成分分析/绝对主成分得分(PCA/APCS)受体模型对大气颗粒物的不同来源进行了分析。源解析结果表明，邻苯二甲酸、偏苯三甲酸和4-甲基邻苯二甲酸的主要来源主要是二次转化，机动车尾气等一次排放对偏苯三甲酸的贡献较小；二次转化和生物质燃烧对间苯二甲酸的贡献最为显著，机动车尾气贡献较小；对苯二甲酸的来源是生物质燃烧和机动车尾气等一次排放。
