Radioanalytical method for ¹⁴⁸Gd analysis in environmental and bioassay samples

Area of Science:

• Radiochemistry
• Analytical Chemistry
• Environmental Science

Background:

• Accurate detection of pure alpha emitters like Gadolinium-148 (¹⁴⁸Gd) is crucial for radiological safety.
• Existing methods may lack the sensitivity or adaptability for diverse environmental matrices.
• Neutron spallation facilities require robust monitoring for potential radiological events.

Purpose of the Study:

• To develop and validate a sensitive radioanalytical method for ¹⁴⁸Gd quantification.
• To ensure preparedness for radiological emergencies at neutron spallation sources.
• To provide a versatile method applicable to various environmental and bioassay samples.

Main Methods:

• Multi-step ion exchange chromatography.
• Extraction chromatography for selective separation.
• Electrodeposition for high-purity alpha spectrometry source preparation.

Main Results:

• Achieved high selectivity and sensitivity for ¹⁴⁸Gd detection.
• Demonstrated adaptability across matrices including soil, water, and air filters.
• Reported low minimum detectable activities (e.g., 0.23 mBq g⁻¹ for soil).
• Chemical recoveries varied from 26% (air filters) to 60% (soil).

Conclusions:

• The validated method provides a reliable tool for ¹⁴⁸Gd monitoring in environmental and bioassay samples.
• This technique significantly contributes to radiological emergency preparedness and nuclear safety.
• The method's adaptability suggests potential for analyzing other long-lived alpha emitters.