首页|Rapid sequential determination of Rn-222 and Ra-226 in drinking water by liquid scintillation counting
Rapid sequential determination of Rn-222 and Ra-226 in drinking water by liquid scintillation counting
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NSTL
Elsevier
Since daily drinking water is one of the major source for the ingestion of radiotoxic Rn-222 and Ra-226, the demand for a simple method to determine these two radionuclides has significantly increased. In the present study, a rapid, simple sequential analysis method for determining Rn-222 and Ra-226 in drinking water using a liquid scintillation counter was developed. The method employs solvent extraction and correction equations for the effect of native Rn-222 for Ra-226 analysis. Validation and examination of applicability for drinking water analysis were conducted using Rn-222-injected water and Ra-226 standard source. Minimum required counting times for examining drinking water on Quantulus 1220 and Hidex 300SL were estimated via minimum detectable activity depending on the counting time. In addition, the correction method, including an equation for reducing analysis time by more than 10 days, was suggested based on the analytical results for different elapsed times between sampling and measurement.
NSTL
Elsevier
