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Characterization of the NIST seaweed Standard Reference Material. |
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| Authors: | I Outola J Filliben K G W Inn J La Rosa C A McMahon G A Peck J Twining S G Tims L K Fifield P Smedley M P Antón C Gascó P Povinec M K Pham A Raaum H-J Wei G C Krijger P Bouisset A E Litherland W E Kieser M Betti L Aldave de las Heras G H Hong E Holm L Skipperud A V Harms A Arinc M Youngman D Arnold H Wershofen D S Sill S Bohrer H Dahlgaard I W Croudace P E Warwick T K Ik?heimonen S Klemola S M Vakulovsky J A Sanchez-Cabeza |
| Institution: | National Institute of Standards and Technology, Gaithersburg, MD 20899, USA. iisa.outola@nist.gov |
| Abstract: | The National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) for seaweed was developed through an interlaboratory comparison with 24 participants from 16 countries. After evaluating different techniques to calculate certified values for the radionuclides, the median method was found to be the most representative technique. The certified values were provided for 13 radionuclides and information values were given for 15 more radionuclides. Results for the natural decay series showed disequilibrium in both the uranium and thorium series. |
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