Title:Investigation of Radiolabeling Efficacy by Enhancement of the Chemical
form of no Carrier Added 177Lu Isolated by Electro Amalgamation Process
Volume: 15
Issue: 1
Author(s): Sara Vosoughi, Nafise Salek *, Simindokht Shirvani Arani, Ali Bahrami Samani and Mohammad Ghannadi Maragheh
Affiliation:
- Nuclear Fuel Research School, Nuclear Science and Technology Research Institute (NSTRI), Iran
Keywords:
177Lu, electro-amalgamation separation, 5, 10, 15, 20-tetrakis(phenyl)porphyrin (TPP), radiolabeling efficacy.
Abstract:
Background: Due to the suitable nuclear decay characteristics, 177Lu is an attractive radionuclide
for various therapeutic applications. The non-carrier added form of177Lu has drawn
much attention because of its high specific activity needed in radiolabeling studies. There have
been several separation methods for NCA177Lu production.
Objectives: Among the various separation methods, the electro-amalgamation separation method
has got a large potential for large scale production. Li presence is a significant problem in this separation
method, which seriously affects the radiolabeling efficiency.
Methods: In this study, Li was separated from the final product of electro-amalgamation separation
by adding an ion-exchange chromatography column to the separation process.
Results: NCA 177Lu was obtained by 84.09% ELM separation yield, 99.9% radionuclide purity
and, 65 Ci/g specific activity. Then, 177Lu (177LuCl3 chemical form) was separated from Li using the
ion exchange chromatography method by a separation yield of 94%. The obtained results of the radiolabeling
efficacy studies showed that the radiochemical purity and radio-complex stability were
significantly increased by separating NCA 177Lu from Li.
Conclusion: This new separation setup consisting of two steps allows using 177Lu of such a favorable
quality for labeling studies.