The natural abundance of 129I has been changed through anthropogenic activities. It is emitted in gaseous and liquid form by the nuclear reprocessing facilities in Western Europe, with most of it as liquid waste which flows into the North Sea [1]. From there it is reemitted to and distributed in the atmosphere, and precipitates as wet deposition [2].We analyse precipitation and river water samples from several sampling locations in Germany.Iodine is extracted from the water using ion exchange resin. 127I is analysed by ICP-MS and the isotopic ratio is determind via AMS.Isotopic ratios range between 14�10-9 and 2000�10-9 (precipitation) and between 3�10-9 and 40�10-9 (river water), and are at least 3 orders of magnitude higher than the natural isotopic ratio of 1.5�10-12[2].[1] J.M. G�mez-Guzm�n et al. (2012) Atmospheric Enviroment 56  , 26-32. [2] R. Michel et al. (2012) Science of the Total Enviroment? 419  , 151-169.?

Radioactive iodine in precipitation and river water from Germany

245th National Meeting (2013)

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