QUANTITATIVE-ANALYSIS OF SEA-BED SEDIMENTS FROM EASTERN BLACK-SEA BY EDXRF SPECTROMETRY

Sea-bed sediments from Eastern Black Sea have been analyzed for their Fe, Ba and Sr contents using the methods of standard addition and ener gy dispersive X-ray fluorescence (EDXRF). Samples were prepared from p owder sifted by a 200 mesh sieve. An annular 100 mCi Am-241 radioactiv e source emitting 59.543 keV photons was used for excitation and a Ge( Li) detector, which has a 190 eV FWHM for 5.9 keV photons was used for intensity measurements. 2048 channels of the MCA are employed for 20 or 30 min. Dried and ground sea-bed sediments are found to contain 2.9 5 - 7.50% Fe, 0.032 - 0.268% Ba and about 73 - 273 ppm Sr. These resul ts agree with those obtained via atomic absorption methods.