Laser mass spectrometric analysis of organic atmospheric aerosols. 2. Elucidation of urban air pollution processes

被引：24

作者：

Haefliger, OP ^{[1
]}

Bucheli, TD ^{[1
]}

Zenobi, R ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Dept Chem, CH-8092 Zurich, Switzerland

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2000年 / 34卷 / 11期

关键词：

D O I：

10.1021/es991123q

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The dynamic behavior of aerosol-bound polycyclic aromatic hydrocarbons (PAHs) and other polycyclic aromatic compounds (PACs) in urban air was studied over the course of several whole days, both next to a street with heavy traffic and in a city park. Two-step laser mass spectrometry, a highly sensitive and selective technique, allowed measurements with 15 min time resolution. Large variations in particle concentration and chemical composition were observed, reflecting the contributions from Diesel trucks and gasoline-powered cars to urban aerosols. These sources were clearly identified using specific mass spectral patterns. Photochemically induced decay of oxygenated polycyclic aromatic hydrocarbons (OPAHs) was observed to occur within only a few hours. Rapid speciation of aerosol-bound organic carbon is now possible to complement data on routinely monitored atmospheric pollutants.

引用

页码：2184 / 2189

页数：6

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