Biokinetics of ²¹°Po in rats: excretion via urine and faeces and retention in tissues and organs.

Daily excretions of ²¹°Po from rats via urine and faeces following i.v. administration of polonium citrate, from Day 2 to Day 5, were reported, together with retentions in tissues and organs on Day 5. Emphasis is given to the methods of measurement and data quality rather than to the discussion of the observations. The authors aim to contribute data for developing or refining the biokinetic model for ²¹°Po metabolism.