BROMINE AND IODINE IN THE SYSTEM AEROSOL-PLANT

Norway spruce needles from 4 different stations and of different age c lasses have been washed free from the adhering wax and the insoluble a erosols. Bromine and iodine contents were determined separately in the needles, in the wax and in the insoluble aerosols from the needles' s urface by neutron activation analysis. The distribution of Br and I in these 3 fractions shows that a large portion of these elements can be found on the needle surface. The predominant amount of these elements in the external material is present in the wax. Bromine and iodine lo adings on the spruce needles depend on the ambient concentrations at t he stations and increase slightly with needle age. The correlation bet ween the aerosol loadings suggests a common source for these elements. The correlation between Br and I in the needles show an identical bio dynamic behaviour, most probably an uptake by the needle surface.