Size distributions of mutagenic compounds and mutagenicity in atmospheric particulate matter collected with a low-pressure cascade impactor
Size distributions of mutagenic compounds and mutagenicity in atmospheric particulate matter collected with a low-pressure cascade impactor
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DOI：
10.1016/j.atmosenv.2004.01.021
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发表时间：
2004-05-01
影响因子：
5
通讯作者：
Yun, SJ
中科院分区：
文献类型：
--
作者：
Kawanaka, Y;Matsumoto, E;Yun, SJ
利用低压级联撞击器对日本琦玉市大气颗粒物中9种多环芳烃（PAHs）、2-硝基荧蒽（2-NF）的粒径分布及致突变性进行了测定。PM被分离成12个不同尺寸的级分，如下：< 0.11、0.11-0.19、0.19-0.29、0.29-0.48、0.48 -0.68、0.68-1.2、1.2-2.1、2.1-3.5、3.5-5.1、5.1-7.6、7.6-11和>11 μ m。采用气相色谱/质谱电子轰击电离（GC/EI-MS）和负离子化学电离（GC/NCI-MS）分析了大气颗粒物中的多环芳烃（PAHs）和2-硝基酚（2-NF）。在加和不加S9混合物的条件下，使用鼠伤寒沙门氏菌菌株TA 98和YG 1024通过艾姆斯试验测定PM的致突变性。PM的粒径分布为双峰，峰值在0.48-0.68 μ m和3.5-5.1 μ m，而总PAHs、单个PAHs、2-NF和致突变性的粒径分布为单峰，峰值在0.48-0.68 μ m。在细颗粒中发现了近87-95%的这些化合物和88-100%的致突变性，在超细颗粒中发现了2.9-5.8%的这些化合物和5.1-5.9%的致突变性。另一方面，多环芳烃，2-NF和致突变性每单位质量的PM颗粒尺寸变得越来越小。单位质量颗粒物中多环芳烃、2-硝基酚含量和致突变性均以
Size distributions of nine polycyclic aromatic hydrocarbons (PAHs), 2-nitrofluoranthene (2-NF) and mutagenicity in atmospheric particulate matter (PM) were measured by using a low-pressure cascade impactor in Saitama, Japan. PM was separated into 12 fractions of different sizes as follows: < 0.11, 0.11-0.19, 0.19-0.29, 0.29-0.48, 0.48-0.68, 0.68-1.2, 1.2-2.1, 2.1-3.5, 3.5-5.1, 5.1-7.6, 7.6-11 and >11 mum. PAHs and 2-NF in PM were analyzed by gas chromatography/ mass spectrometry with electron impact ionization (GC/EI-MS) and with negative ion chemical ionization (GC/NCI-MS), respectively. Mutagenicity of PM was determined by Ames test using Salmonella typhimurium strains TA98 and YG1024 under the conditions of both with and without S9 mix.The size distribution of PM was bimodal with peaks at 0.48-0.68 mum and 3.5-5.1 mum, while size distributions of total PAHs, individual PAHs, 2-NF and mutagenicity were unimodal with a peak at 0.48-0.68 mum. Nearly 87-95% of these compounds and 88-100% of mutagenicity were found in fine particles, and 2.9-5.8% of these compounds and 5.1-5.9% of mutagenicity were found in ultrafine particles. On the other hand, PAHs, 2-NF and mutagenicity per unit mass of PM increased as the particle size became smaller. The highest contents of PAHs, 2-NF and mutagenicity per unit mass of PM were observed in the fraction of