[17p-A304-1~8] Latest trends in ion beam analysis

[17p-A304-4] Characterization of air-borne particulate matters hourly collected from the atmosphere by focused ion beam analysis technique

〇Wataru Kada¹, Koki Usui¹, Ryota Kikuchi¹, Jinshan Zhang¹, Kimiyo Kumagai², Hiroshi Tago², Takahiro Satoh³, Yasuyuki Ishii³, Osamu Hanaizumi¹ (1.Gunma Univ., 2.Gunma Prefectural Institute of Public Health and Environmental Sciences, 3.QST)

Keywords:PIXE, Particulate Matters, ion microbeam

The concentration and elemental composition of Particulate Matter (PM) are essential indicators for precise assessment of the atmospheric environment, including estimating the origin of transboundary air pollution events. On the other hand, the PM concentrations collected in specific periods in Japan are generally minimal, and it is not easy to analyze their compositions by existing analytical techniques. In response to this, we have proposed using focused ion beam analysis techniques and successfully obtained elemental and chemical compositions of individual filters collected from the atmospheric environment. In this study, we attempted to extend its application to analyze the characteristics of PM samples collected in specific atmospheric events using various focused ion beam analysis approaches. Experimental results suggested that focused ion beams can effectively extract multiple features from PM samples with limited concentrations.