Abstract
The X-ray fluorescence under grazing incidence condition (XRF-UGI) was applied for the direct analysis of aerosol filters. Particulate matter less than 2.5 microns (PM2.5) was collected hourly on polytetrafluoroethylene filters using a continuous PM monitor with a virtual impactor method. Although the sampling mass is in trace amounts of 5–30 μg, the metallic contents, such as V, Cr, Mn, Fe, Zn, and Pb, can be measured at sub-ng m−3 detection limits. The effects of the non-uniformity and poor flatness of the PM filters were discussed with regard to the measurement repeatability. The relationship between the XRF-UGI intensities and the mass concentrations obtained via conventional X-ray fluorescence (XRF) analysis was confirmed using the fundamental parameter method. Finally, quantification was successfully demonstrated using the XRF-UGI results with the relative sensitivity factors.
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Takahara, H., Morikawa, A., Kitayama, S. et al. Elemental analysis of hourly collected air filters with X-ray fluorescence under grazing incidence. ANAL. SCI. 40, 519–529 (2024). https://doi.org/10.1007/s44211-023-00483-6
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DOI: https://doi.org/10.1007/s44211-023-00483-6