Abstract

Abstract Results of the recent intercomparison exercises on Irish Sea sediment (IAEA-385) and a mixed fish sample from the Irish and North Seas (IAEA-414) are compared and discussed. Both materials have been designed for the determination of anthropogenic and natural radionuclides in marine samples. Several anthropogenic and natural radionuclides were analyzed by over 100 laboratories. The data were evaluated and recommended and information values for several radionuclides have been derived. Both materials will be issued as IAEA reference materials (RMs). IAEA-385 will replace IAEA-135 (Irish Sea sediment), which is out of stock. Ongoing and planned intercomparison exercises for determination of radionuclides in seawater (IAEA-418), marine biota (IAEA-437, IAEA-415, IAEA-438 and IAEA-442) and sediment (IAEA-410 and IAEA-412) are presented as well.

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