INVESTIGATION OF ELEMENT SPECIATION IN ATMOSPHERE

Elemental composition of rain water was determined with the use of ins trumental neutron activation analysis. Solid water-insoluble fractions were separated by filtration through membrane filters. Filtrates were dried, and dry residues as well as solid-phase on filters were analyz ed. Concentrations of 20 elements in the samples were determined. Enri chment factors and ratios between element concentrations in liquid and solid fractions were calculated. Data obtained allowed us to suppose that Na, Cl, K, Sc, Cr, Mn, Fe, Se, Br, I, Cs, La, Sm, and Au prevalen tly exist in the air in the form of relatively coarse aerosol particle s; Zn, As, Sb, and Hg prevalently occur in the vapor-gas phase; and Co and W, in the form of finely dispersed aerosol.