ppb-PIXE analysis of the trace-element content in precipitation |
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Authors: | G Henrici D Hofmann H-W Georgii K O Groeneveld |
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Institution: | (1) Department of Meteorology, Johann Wolfgang Goethe Universität, Feldbergstrasse 47, D-6000 Frankfurt/M, Germany |
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Abstract: | PIXE is a well established and valuable method for quantitative and qualitative aerosol elemental analysis. Using this method, we have developed a technique to simultaneously analyse the trace-element content in precipitation for elements with Z> 12. Freeze-drying and leaching was used as a nonselective preconcentration technique. A special backing foil to take up the sample liquid to be dried was developed for these experiments. By careful adjustment of the experimental parameters, we reached a detection limit lower than 1 ppb for most detected elements. Thus, it will be possible to analyze precipitation at low concentrations of trace elements which are important for air chemistry and environmental studies.Supported by DFG/Bonn under Sonderforschungsbereich 233. |
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Keywords: | PIXE preconcentration freeze-drying rainwater fogwater |
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