Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 268, Issue 24, Pages 3554-3560Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2010.09.020
Keywords
Polycapillary X-ray lens; Micro X-ray fluorescence; Quantitative analysis of single aerosol particle
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Funding
- Natural Science Foundation of Beijing, China [1092013]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [200800271021]
- Chinese Ministry of Education [108125]
- Key Laboratory of Evidence Science of Ministry of Education (China University of Political Science and Law) [2010KFKT01]
- Program for Excellent Talents by Beijing Government
- National Natural Science Foundation of China [11075017]
- Beijing Key Laboratory of Applied Optics [JD100270543]
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A laboratory micro X-ray fluorescence spectrometer based on a special polycapillary X-ray lens (PXRL) was used to carry out the source apportionment of aerosol particles. In the curve of the distribution of the X-ray intensity in the focal spot of the special PXRL, there was a plateau with a diameter of 21.3 mu m in which the distribution of the X-ray intensity was homogeneous. The gain in flux density in the plateau of the PXRL is 1490. The uniformity of this plateau was 2.9%. This was helpful for the quantitative X-ray fluorescence analysis of a single aerosol particle with smaller size than that of the plateau of the PXRL. The fingerprint database of aerosol particles with given sizes from various air pollution sources was established with the single particle analysis method. The size-resolved source apportionment of aerosol particles in haze in Beijing city was performed with this fingerprint database. (C) 2010 Elsevier B.V. All rights reserved.
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