Validation of Radiochemical Method for the Determination of Sr-90 in Environmental Samples

Abstract

The proposed and validated method for determination of Sr-90 content in environmental samples (water, soil and plant) is based on the radiochemical analytical separation of Y-90 from the sample and measuring its activity after the establishment of radioactive equilibrium with Sr-90. Validation is the confirmation by examination and provision of objective evidence that they meet the individual requirements stipulated for a specific use. Validation of method was done based on the blank samples for water by adding Sr-90 known activity and using reference materials of soil (IAEA-326) and plant (IAEA-330). Content of Sr-90 in environmental samples was determined by alpha/beta low level proportional counter. The accuracy and the precision of the applied method are confirmed and the method is validated and can be used for determination of Sr-90 in environmental samples. On the other hand, participations in interlaboratory comparisons are confirmed that the adequacy of the validated method is ensured.