Sarayegord Afshari N, Abbasisiar F, Abdolmaleki P, Ghiassi Nejad M. Determination of 40K concentration in milk samples consumed in Tehran-Iran and estimation of its annual effective dose. Int J Radiat Res 2009; 7 (3) :159-164
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, parviz@modares.ac.ir
Abstract: (14688 Views)
Background: Since 40K is the most important
natural radionuclide in the environment, its
concentration was measured for all milk and milk
powder samples consumed in Tehran-Iran. Milk was
chosen, since because it is a reliable indicator of the
general population intake of certain radionuclide, and
many environmental programs have been applied for
its safety. Materials and Methods: Measurements
was done using a CANBERRA gamma spectrometer
Model No. S100. Forty one milk and milk powder
samples were choosen for the gamma spectroscopy
analysis. Results: The average activity concentrations
for 40K in the samples were calculated, 31.0 ± 6.1
and 17.1 ± 3.3 Bq.kg-1, in milk and milk powder
respectively. These data correspond to the effective
dose of 14 μSv.year-1 for adults and in the range of
6.4-15.9 μSv.day-1 for children. Conclusion: Considering
the obtained data from liquid milk samples, an
almost uniform distribution of 40K can also be
obtained. Furthermore, the calculated effective doses
were too low to induce important health hazards
however, the data useful for monitoring. Iran. J. Radiat.
Res., 2009 7 (3): 159-164
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