A method is described for the determination of 90Sr in environmental samples using combination of developed in-house method, Eichrom Sr resin and Beta Counter. Strontium was
efficiently, rapidly and simply separated from Ca and other interfering matrix components by Eichrom Sr resin. All the results
in general showed good accuracy, high precision, reliable and in good agreement between these two measured and certified value
of SRM (i.e. IAEA-375, IAEA-326, IAEA-152 and IAEA-414). As a whole, the procedure described in this work notably improves
conventional methods in particular concerning the time needed, sample volume, safer and others. Thus, the introduced method
was successfully performed and will be applied to actual sample for the determination of 90Sr in different environmental materials such as soil, sediments, milk, biological sample, water etc.