Host: The Japan Radiation Research Society
Co-host: Asian Association for Radiation Research
For monitoring of workers, internal dose due to α, β-nuclides is evaluated by analyses of urine and faces samples. The analysis time of α, β-nuclides is usually longer than γ-nuclides. In a radiological emergency, a rapid bioassay are required. In present study, Sr-extraction resin was used to develop a rapid analysis of Sr-90 in urine samples. Urine samples (200-300 ml) were treated by HNO3 and Sr fraction was coprecipitated with calcium phosphate. The precipitate was resolved into 8M HNO3 and loaded onto the Sr-resin (Eichrom Industries Inc). Strontium-90 and/or strontium were eluted by 0.05M HNO3. Strontium-90 and strontium were determined by a low-background β-counter and an inductively coupled mass spectrometry, respectively. Recovery tests of 90Sr spiked between 20-700mBq yielded an good recovery (91-105%). A few ten ng Sr per ml urine was detected by this method. The Sr-resin is expensive, but was economy with time for analyses. It was useful resin in urine analyses.
