Elemental analysis of hourly collected air filters with X-ray fluorescence under grazing incidence.
Anal Sci
; 40(3): 519-529, 2024 Mar.
Article
en En
| MEDLINE
| ID: mdl-38143248
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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MEDLINE
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En
Revista:
Anal Sci
Año:
2024
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Article
País de afiliación:
Japón