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Abstract
As part of an epidemiological survey to determine public exposure to natural radiation and to estimate radionuclide levels in the diet of residents in a high level background radiation area at Ramsar in Iran, 210Po concentrations were determined in 24-hour urine samples by means of a liquid scintillation counting technique. The maximum and minimum mean concentrations of 210Po in 100 ml of urine were 2.61 (±0.09 SE) and 1.52 (±0.08 SE) mBq, respectively, with an overall mean of 2.00 (±0.86 SE) mBq in 45 samples; the mean 210Po concentration in 100 ml of 20 control samples from local residents in areas where background radiation has been determined as normal was 0.86 (±0.03 SE) mBq. We conclude that the urinary 210Po concentration in residents is elevated in proportion to the background levels, but so far there is no evidence of health problems.
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