Demonstration of a ²²⁸Ra/²²⁸Ac isotope generator

Area of Science:

• Nuclear Chemistry
• Radiochemistry
• Biomedical Engineering

Background:

• Actinium-228 (²²⁸Ac) is a medically relevant radioisotope.
• Efficient and safe production methods are crucial for its clinical use.
• Existing methods may have limitations in yield, purity, or biocompatibility.

Purpose of the Study:

• To develop and optimize an isotope generator for producing ²²⁸Ac from ²²⁸Ra.
• To evaluate the performance of the generator in terms of yield and purity.
• To ensure the suitability of the production method for radiopharmaceutical applications.

Main Methods:

• Development of a cation exchange resin column.
• Elution using an acetate-diethylenetriaminpentaacetic acid buffer.
• Optimization of elution conditions, including pH, for ²²⁸Ac separation from ²²⁸Ra.

Main Results:

• Successful development of an isotope generator for ²²⁸Ac production.
• High ²²⁸Ac yields (approximately 95%) achieved over 47 days of elution.
• No detectable breakthrough of ²²⁸Ra observed, indicating high purity.
• The process utilizes biocompatible reagents at pH 4.6.

Conclusions:

• The developed isotope generator provides a reliable and efficient method for producing high-purity ²²⁸Ac.
• The biocompatible nature and optimal pH make it suitable for radiopharmaceutical studies.
• This advancement facilitates the clinical application of ²²⁸Ac-based therapies.