Abstract: As part of the 2013 Nuclear and Radiation Safety Supervision and Management Project Plan issued by the Ministry of Environmental Protection, thorium has been identified as one of the key radioactive elements to be monitored across various provinces, cities, and counties. The radiation environment is under continuous surveillance, and both local monitoring stations and environmental protection agencies are required to analyze the strontium content in state-controlled water samples. This study focuses on the application of UV-visible spectrophotometry for the accurate determination of radioactive elements in water samples, providing a reliable and efficient method for environmental monitoring. By employing this technique, laboratories can ensure compliance with national safety standards and contribute to the overall assessment of radiological risks in water resources. The method offers advantages such as simplicity, cost-effectiveness, and high sensitivity, making it particularly suitable for routine analysis in environmental monitoring programs.
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