Research on the Rapid Analysis Method of

As an important fission product generated in nuclear reactors, 90Sr is characterized by its high fission yield, long half-life, and tendency to enter the human body through the food chain, making it a key nuclide of concern in environmental radioactivity assessment. To enable rapid detection of 90Sr in environmental samples under nuclear emergency conditions, a fast analytical method for 90Sr in environmental soil samples was developed based on triple quadrupole inductively coupled plasma mass spectrometry (ICP-MS). The method involves extracting Sr from soil via acid leaching, separating it from the matrix through co-precipitation with Ca(OH)2, and further purifying Sr using Sr resin chromatography. The 90Sr content was then determined by ICP-MS under a mixed gas flow of 1.0 ml/min NH3 and 2.0 ml/min He. This method achieved a detection limit of 4.3 mBq/kg for 90Sr in soil samples, with a total analysis time of 10 hours. Compared to traditional radiometric methods requiring 3–5 days for analysis, it better meets the need for rapid 90Sr analysis under nuclear emergency response conditions.