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Intercomparison of Rn-222 determination from groundwater
P Vesterbacka1, H Pettersson, U-M Hanste
1Radiation and Nuclear Safety Authority (STUK), Laippatie 4, 00880 Helsinki, Finland. pia.vesterbacka@stuk.fi
Summary
Eight Nordic laboratories demonstrated high analytical capability in determining radon-222 (Rn-222) in groundwater. Results were accurate, within 20% of the median, highlighting effective methods for this challenging gaseous radionuclide.
Area of Science:
- Environmental Science
- Radiochemistry
- Analytical Chemistry
Background:
- Radon-222 (Rn-222) is a naturally occurring radioactive gas.
- Accurate determination of Rn-222 in groundwater is crucial for environmental monitoring and public health.
- Gaseous radionuclides like Rn-222 present unique analytical challenges.
Purpose of the Study:
- To assess the analytical performance of Nordic laboratories in Rn-222 determination.
- To evaluate the reliability and comparability of Rn-222 measurement techniques used in the region.
- To identify areas for improvement in Rn-222 analysis.
Main Methods:
- An intercomparison exercise was organized involving eight Nordic laboratories.
- Participants analyzed groundwater samples for Rn-222 concentration.
- Results were compared against a median value and individual laboratory uncertainties.
Main Results:
- Most laboratory results for Rn-222 determination were within 20% of the median value.
- Results were generally within the reported measurement uncertainties.
- The exercise demonstrated a high level of analytical capability among participating laboratories.
Conclusions:
- Nordic laboratories possess strong analytical capabilities for Rn-222 determination in groundwater.
- The intercomparison exercise confirmed the reliability of current measurement techniques.
- Continued intercomparison exercises are recommended to maintain high analytical quality for Rn-222 analysis.
