Summary
A relatively simple chemical separation procedure has been developed for the simultaneous determination of89Sr and 9 0Sractivities in water samples and on aerosol-filters of the Nuclear Power Plant (NPP) Paks origin. The procedure combines the cation-exchange chromatographic (Dowex 50 WX 8 resin) and solid phase extraction (EIChroM Sr.SpecÔ, DC18C6 crown ether) steps. The beta-radiation of radionuclides can be measured directly after the chemical separation by LSC. The activities of89Sr,90Sr and90Y are calculated from an over determined set of equations using a method of constrained optimization technique. The equations are based on LSC measurements performed in three counting windows plus the90Sr-90Y decay law. The chemical yield of strontium is determined by ICP-AES. The lowest limits of detectable activity, for the measurement time of 600 minutes, are 30 mBq/sample and 18 mBq/sample for89Sr and90Sr, respectively.
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Chobola, R., Chobola, R., Mell, P. et al. Rapid determination of radiostrontium isotopes in samples of NPP origin. J Radioanal Nucl Chem 267, 297–304 (2006). https://doi.org/10.1007/s10967-006-0044-6
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DOI: https://doi.org/10.1007/s10967-006-0044-6