Structural analysis of aerosol particles by microscopic observation using a Time-of-Flight secondary Ion Mass spectrometer
Structural analysis of aerosol particles by microscopic observation using a Time-of-Flight secondary Ion Mass spectrometer
复制标题
使用飞行时间二次离子质谱仪通过显微观察来分析气溶胶颗粒的结构
DOI：
10.1002/jgrd.50477
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Masaaki Fujii
中科院分区：
文献类型：
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作者：
Akinori Takami;Norihito Mayama;Tetsuo Sakamoto;Kenji Ohishi,Satoshi Irei,Ayako Yoshino,Shiro Hatakeyama,Kentaro Murano,Yasuhiro Sadanaga,Hiroshi Bandow,Kentaro Misawa;Masaaki Fujii
2011年春天，在日本的江岛，使用气溶胶四极质谱仪（Q-AMS，Aerodyne Research，Inc.）分析了直径小于1 µm的细气溶胶颗粒的化学组成和结构。和飞行时间二次离子质谱仪Q-AMS结果与之前在同一地点进行的研究结果相似，表明我们观察到的成分是该地点的典型成分。根据西姆斯结果，我们将细颗粒气溶胶分为三种类型：A型，其中硫酸盐被有机质（OM）覆盖; B型，其中直径为0.5 µm的含土壤颗粒与硫酸盐和OM相关;以及C型，其中黑碳（BC）和硫酸盐聚集体与OM相关。在观察期间，A型、B型和C型颗粒的相对丰度分别为55%、20%和25%。每种粒子的结构、化学成分和比例为辐射模型中更具代表性的粒子模型提供了信息。C型的相对丰度，即，含有BC的颗粒物与东京的情况大不相同，这表明C型可能是跨界空气污染的指标，在这种情况下来自中国大陆。
The chemical composition and structure of fine aerosol particles with diameters of less than 1 µm were analyzed in the spring of 2011 at Fukue Island, Japan, using an aerosol quadrupole mass spectrometer (Q‐AMS, Aerodyne Research, Inc.) and a time‐of‐flight secondary ion mass spectrometer (TOF‐SIMS). The Q‐AMS results were similar to those of previous studies conducted at the same location, suggesting that the composition we observed is typical of this site. Based on the TOF‐SIMS results, we classified the fine aerosol particles into three types: Type A, in which sulfate was covered with organic matter (OM); Type B, in which soil‐containing particles with a diameter of 0.5 µm were associated with sulfate and OM; and Type C, in which black carbon (BC) and sulfate aggregates were associated with OM. During the observation period, the relative abundances of Type A, B, and C particles were 55%, 20%, and 25%, respectively. The structure, chemical composition, and the proportion of each type of particles provide information for a more representative particle model in radiative models. The relative abundance of Type C, i.e., BC‐containing particles, is quite different to that in Tokyo, suggesting that Type C could be an indicator of transboundary air pollution, in this case from mainland China.