INST2019 (International Nuclear Science and Technology Conference)

4-6 February 2019
Asia/Bangkok timezone
Deadline for full paper revision: 21 May 2019.

Verification of $^{90}$Sr determination in marine animals

4 Feb 2019, 14:50
1h

Chatuchak, Bangkok 10900, Thailand
Poster Agriculture and Food

Speaker

Dr Suputtra Visetpotjanakit (Office of Atoms for Peace)

Description

Sr-90 is considered as a hazardous radiounclide for humans. When it is consumed, it would be eventually accumulated in bone and its daughter, $^{90}$Y, could then harm bone marrow. To monitor $^{90}$Sr in the environment especially in marine food samples it is very important for Thailand as the consumtion of marine animals is high and these animals are also exported all over the world and play an important part of the economy. To measure $^{90}$Sr in our food samples, a liquid extraction technique using bis-2-etylhexyl-phosphoric acid to separate and purify yttrium followed by Cherenkov counting to determine $^{90}$Y in secular equilibrium to $^{90}$Sr were developed at the Office of Atoms for Peace’s laboratory. The analytical performance was validated for all criteria i.e. accuracy, precision and trueness. Sr-90 determination in spiked mussel samples with various activity concentrations in a range of 2 – 1000 Bq/kg dry weight were performed for statistical evaluation. The results had a relative bias within the accepted relative bias of +/-25% i.e. in the range from 10.36 to 16.98 and passed all criteria. This could confirm our analytical approach for $^{90}$Sr determination in marine animals and foodstuffs was accepted. Moreover the method is cost-efficient, simple and fast to analyse $^{90}$Sr in the samples.

Primary author

Dr Suputtra Visetpotjanakit (Office of Atoms for Peace)

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