Document Detail


Matrix effects in PIXE analysis of aerosols and ashes.
MedLine Citation:
PMID:  10676519     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A comparison of instrumental neutron activation analysis (INAA) and proton-induced X-ray emission (PIXE) results for size-fractionated atmospheric aerosols ("coarse" and "fine" fractions with an equivalent aerodynamic diameter of 2-10 microns and < 2 microns, respectively, or the PM10 fraction) showed that PIXE yielded significantly lower results for the PM10 and coarse fractions, especially for elements with a low Z resulting from a particle size effect. Somewhat lower PIXE results were also obtained for the fine fraction of atmospheric aerosols. A correction is also needed for irregularly shaped deposits of combustion aerosols collected by a cascade impactor in 11 size fractions ranging from 0.016 to 14.3 microns, as well as for thick samples of fly and bottom ashes. An equivalent layer thickness (ELT) model is proposed to correct the matrix effects in PIXE. The approaches for the calculation of ELT using a comparison of PIXE and INAA results or by comparing PIXE results obtained using two different incident proton beam energies (1.31 and 2.35 MeV) are described. The correction for the ash pellets and irregular deposits are also discussed.
Authors:
V Havránek; J Kucera; J Horáková; V Vosecek; J Smolík; J Schwarz; I Sýkorová
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biological trace element research     Volume:  71-72     ISSN:  0163-4984     ISO Abbreviation:  Biol Trace Elem Res     Publication Date:  1999  
Date Detail:
Created Date:  2000-03-02     Completed Date:  2000-03-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7911509     Medline TA:  Biol Trace Elem Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  431-42     Citation Subset:  IM    
Affiliation:
Nuclear Physics Institute, Academy of Sciences of the Czech Republic (ASCR), Rez near Prague, Czech Republic.
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MeSH Terms
Descriptor/Qualifier:
Aerosols / analysis*
Neutron Activation Analysis
Particle Size
Spectrometry, X-Ray Emission
Chemical
Reg. No./Substance:
0/Aerosols

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