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南京大气中多环芳烃的相分布
Phase Partitioning of Polycyclic Aromatic Hydrocarbons in Nanjing Atmosphere
【摘要】 采用玻璃纤维滤膜(GF)和聚氨基甲酸乙酯泡膜(PUF)同时采集南京大气中颗粒态和气态上的多环芳烃(PAHs),用气质联用仪分析了16种优先控制的PAHs,研究了PAHs在南京大气中的相分布,研究结果表明,颗粒态和气态样品中16种PAHs的平均浓度值分别为20.49ng/m3和182.45ng/m3,2~3环的PAHs主要分布在气态中,而>4环的PAHs主要分布在颗粒态中。
【Abstract】 Polycyclic aromatic hydrocarbons(PAHs)in the atmosphere of Nanjing were collected simultaneously through GF film and PUF.Sixteen precedence-controlled PAHs of EPA were determined using gas chromatography with mass spectrometry detection(GC/MS).The phase-distribution of PAHs in the atmosphere of Nanjing was investigated,and results showed that the average total particulate and gas concentrations were 20.49ng/m3 and 182.45ng/m3 respectively.PAHs with two or three aromatic rings were mainly presented in the gas phase while PAHs with more than four rings were found mainly in particle phase.
【Key words】 polycyclic aromatic hydrocarbons (PAHs); aerosol; phase distribution;
- 【文献出处】 环境科学与技术 ,Environmental Science & Technology , 编辑部邮箱 ,2007年04期
- 【分类号】X513
- 【被引频次】32
- 【下载频次】425