@article{oai:repo.qst.go.jp:00080599,
 author = {Kada, W. and Nakatsu, S. and Imayoshi, T. and Kumagai, K. and Tago, H. and Satoh, Takahiro and Koka, M. and Miura, K. and Hanaizumi, O. and Kamiya, T. and Takahiro, Satoh},
 journal = {Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms},
 month = {Oct},
 note = {Particulate matter (PM) collected hourly by an automated sampling unit of the Atmospheric Environmental Regional Observation System (AEROS) was characterized by external micro-particle-induced X-ray emission (PIXE) analysis and imaging. Micro-PIXE analysis revealed the overall elemental composition and differences in the elemental composition ratios of PM2.5 and PM2.5-10 collected as individual spots on Teflon tape filters from the unit, and the blank Teflon tape showed a clean background. Moreover, micro-PIXE imaging visualized regions with different elemental compositions in PM2.5 and PM2.5-10. Accumulation of PM2.5 particles was found frequently on tape filters which accounted approximately for 70% of particular elemental composition including heavy metals like iron, compared to that from whole area. The results suggest that PIXE effectively reveals elemental composition of hourly-collected PM by AEROS system for futuristic application for source apportionment of those over Japan.},
 pages = {133--137},
 title = {In-air micro-particle-induced X-ray emission imaging and spectroscopy of air-borne particles collected hourly from an automated sampling unit of the atmospheric environmental regional observation system},
 volume = {477},
 year = {2020}
}