Distribution of organochlorine compounds in pine needles collected in Zagreb.

The distribution of polychlorinated biphenyls and organochlorine pesticides was investigated in one- and two-year-old pine needles collected at eight locations in Zagreb in 2006. Concentration medians for most analyzed compounds in two-year-old needles were higher or similar to the concentration medians of the same compounds in one-year-old needles, with the exception of PCB-28, PCB-52, PCB-153, and PCB-138. The pollution profiles seems to have remained the same over the 2 years. These results were compared to those obtained in samples collected at the same locations in 1998.