Volume 37, Number C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-979 - C1-984|
|Published online||25 March 2010|
129I and 129I/127I ratio measurements in environmental samples by RNAA, AMS and direct γ-X spectrometry. Intercomparison exercises
IPSN/DPRE/SERNAT, CEN Saclay, bâtiment 130, 91191 Gif-sur-Yvette cedex, France
2 IPSN/DIR-DDP, BP. 6, 92265 Fontenay-aux-Roses cedex, France
3 CEA/DSM/DRECAM/LPS, CEN Saclay, bâtiment 647, 91191 Gif-sur-Yvette cedex, France
4 CSNSM/IN2P3/CNRS, bâtiment 108, 91405 Orsay, France
129I, is a natural long-lived isotope, with a half-life of 15.7 million years, also artificially produced in nuclear power plant and released in liquid and gaseous effluents of nuclear fuel reprocessing plants. Due to the lack of environmental international reference material for 129I, interlaboratory comparison exercises are very rare and validation of new measurement techniques is very difficult to achieve. This study presents three intercomparison exercises on the 129I and 129I/127I measurements using three different techniques: Radiochemical Neutron Activation Analysis, Accelerator Mass Spectrometry and direct γ-X spectrometry associated with Ionic Chromatography. The first intercomparison was performed on a Fucus serratus sample, leading to propose it as a reference material. The others intercomparison exercises were performed on samples of different biological matrices, marine and terrestrial, presenting various 129I activity levels. The different intercomparison exercises results showed a good agreement between the three techniques on the considered environmental matrices, for samples with 129I activity comprised between 0.2 and 200 Bq.kg-1 dry weight.
© EDP Sciences, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.