Tissue and subcellular distributions of 210Po in the crustacean Saduria entomon inhabiting the southern Baltic Sea

The paper presents the results of 210Po determinations, and 210Po/210Pb activity ratios, in the tissues and organs of the Baltic crustacean Saduria entomon. Additionally, the subcellular localisation of 210Po in the hepatopancreas of this organism has been studied using centrifugation followed by determination of the 210Po concentrations in isolated fractions. The 210Po concentrations fall within the range 0.63–543.5 Bq kg−1 (dry wt). The highest values of 210Po and 210Po/210Pb activity ratio (10.6) were found, as expected, in the hepatopancreas. The majority of the 210Po in the hepatopancreatic cells was found in the cytosol fraction (60% of the total 210Po).