A simple analytical method was developed for the determination of 90Sr in fish bone ash samples. The adsorption behaviors of 26 metal ions on Sr Resin and AnaLig Sr-01 resin were examined. The obtained distribution coefficients show that Sr Resin has suitable selectivity. The proposed method consists of co-precipitation with calcium phosphate and purification by Sr Resin. After ingrowth, 90Y was measured using a liquid scintillation counter. The proposed method was validated by radiometric analysis of 90Sr in certified reference materials. Finally, the proposed method was applied for interlaboratory comparison. The analytical results by proposed method showed acceptable z scores.
