作 者：
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机构地区：
中国科学院广州地球化学研究所有机地球化学国家重点实验室
出 处：
《环境科学学报》
2005年第3期319-323,共5页
摘 要：
为了了解广州市大气气溶胶中不同粒径颗粒物中有机物的污染水平以及其对人体健康的影响 ,用 6段分级采样器分段采集
The particulate samples were collected from the atmosphere in LiWan district (Guangzhou) by using Andersen model SA235 high volume cascade impactor. The aerosol particles were separated into six fractions (five stages and a backup filter). The concentrations of total polycyclic aromatic hydrocarbons (PAHs) were measured by GC-MS, and the mutagenicity of urban particulate matter was measured by using the standard plate incorporation test on Salmonella typhimurium. The results showed that, fourty-two individual PAHs were identified, including 15 kind of priority controlled PAHs which account for more than 60% of total PAHs in the samples. Furthermore, the concentrations of some four-ring and all more than five rings PAHs increased as the particle size decreased. The Ames test results showed that all the extracts from various size airborne particles appeared the mutagenicity in the condition with or without S9. And the finer the particulate matter was, the greater the mutagenicity was. Moreover, similar mutagenic potency (mutagenicity per μg and per m^3) trend also existed. Both indirect and direct acting mutagenicity were also observed. There were more indirect-acting mutagens in 1.5～10 μm particulate matter, and more direct-acting mutagens in 0.95～1.5 μm, 0.49～0.95 μm and <0.49 μm particulate matter.
关 键 词：
广州市
大气颗粒物
有机提取物
致突变性
大气污染
粒径分布
气溶胶
领 域：
[环境科学与工程]
