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Cellulose cylinders and circular filter papers spiked with known amounts of standard element solutions were prepared for studying some aspects of assessing measurement uncertainty of NAA and the elemental distribution measured by micro-PIXE analysis. Results for the cylinders showed strongly non-homogeneous distribution of the elements, both in radial and vertical directions, dominantly caused by osmosis driven transport of added liquid solution from the centre to the edges. Results for the thin cellulose filter paper disks exhibited weaker peaking of the standard element concentrations at the edges in comparison with the thick cylinders.

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Journal of Radioanalytical and Nuclear Chemistry
Authors: M. Žitnik, M. Budnar, K. Ravnikar, M. Uršič, N. Grlj, M. Jakomin, Z. Rupnik, and P. Pelicon


In evaluation of the influence of environmental pollution on the ecosystem, data about the elemental concentrations of the atmospheric aerosols, combined with information about particle size and meteorological data, are of significant importance. They are also necessary prerequisites for source/receptor studies and long-range transport modeling. As such, these data are irreplaceable for the estimation of potential elemental input from air to the sea, an understanding of which is one of the tasks of the Mediterranean Pollution Programme (MED POL). Three sampling locations (Sečovlje, Koper, and Iskrba) in Slovenia were chosen for the present study, two at the coast and the third one in a scarcely inhabited, almost unpolluted area, as a reference point, and the element concentrations in the collected particulate matter (PM) were determined. From the Iskrba data the wet scavenging coefficient of airborne sulphur due to precipitation was estimated as k = (1.0±0.3)·10−4s−1 (at 1.5 mm·h−1).

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