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  • 1 Moscow State University Chemistry Department Vorob'yovy Gory 119899 Moscow Russia
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Determination of lead-210 in bottom sediments is applied for evaluation of sedimentation rates and sediments ages by concentration profiles of disequilibrated lead-210 from atmospheric sources. Advences in low level liquid scintillation spectrometry (LS) fitted for natural radioactivity measurements, permit to combine the possibility of immediate bismuth-210 separation with its radioactivity registration using LS spectrometer Quantulus (LKB-1220, Wallak, Finland). The method was tested on bottom sediment samples from Baltic Sea shelf, collected during the 76th cruise of RV Academician S. Vavilov. The proposed method of separation, purification and chemical yield determination is characterized by simplicity, rapidity and may be used in routine analysis.