Rapid Determination of Sr-90 in Environmental Matrices by SPE-ICP-MS for Emergency Monitoring

In order to evaluate the migration and transfer of radionuclides in the environment, not only Strontium-90 (Sr-90) in water but also those in soil and biological samples should be measured. For rapid quantification of Sr-90, a new method by means of online solid phase extraction coupled with inductively coupled plasma mass spectrometry (SPE-ICP-MS) has been developed. In this method, it is unavoidable to eliminate the interference by polyatomic ion induced by isotopes and matrices in fishes. In this study, SPE-ICP-MS method was applied to the measurement of Sr-90 in fishes, and the influence of the Sr isotopes and coexisting ions such as Ca element was evaluated. The detection limit (3σ) was evaluated as 0.35Bq/L (740Bq/kg), which was applicable level to WHO guidelines for drinking water quality.