HEAVY-METAL DETERMINATION IN MOSS SAMPLES FROM THE KAMPINOS-NATIONAL-PARK

Studies of heavy metal content in moss samples (Entodon schreberi) are presented. A total of 30 samples were collected from 10 sites in the Kampinos National Park area. Before metal determination, the samples ( washed and non-washed separately) were sorted, fritted and then dry mi neralized in a quartz oven. Zn, Cd, Pb and Cu were determined using an odic stripping voltammetry in differential pulse mode (DPASV). Other m etals were determined by spectrophotometric method: Fe using sulfosali cylic acid, Mn using formaldehyde oxime and Ni using dimethylglyoxime. The results showed a considerable scatter, probably due to nonhomogen eity of the samples, whose brown fragments represented old and green f ragments represented young moss portions.