Characterisation of trace elements in dry depositions by instrumental neutron activation analysis

Abstract

The determination of trace elements present in dry atmospheric depositions by instrumental neutron activation analysis (INAA) is reported. Eighteen elements, As, Br, Co, Cr, V, Sb, Mn, Zn, Ce, Fe, Hf, La, Mg, Rb, Sc, Th, Na and K, were determined in 22 samples that were collected every month over 2 years (1985–87).

The results show characteristic groups of elements, i.e., anthropogenic, non-anthropogenic and toxic, and elements showing seasonal variations. The results obtained offer a preliminary series of data on the natural fallout in an urban industrialised area in northern Italy.