Authors:T. Bučar, B. Smodiš, P. Pelicon, J. Simčič, and R. Jaćimović
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.
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).