Extracting Technetium from Neutral Molybdenum Solution with Activated Carbon Filber

Abstract

The use of the chromatographic method to extract 99Tcm from the low specific activity 99Mo solution is an effective way to obtain medical isotope 99Tcm that meeting clinical requirements. It has been reported that the separation technologies must use strong acid or strong alkaline solutions, which require additional treatments. Exploring the method of separating technetium from neutral molybdenum solution can simplify the treatment process. A kind of activated carbon fiber was used to extract technetium from neutral low specific activity 99Mo (＜0.2 Ci/g Mo) in 1 mol/L NaCl solution. Neutral eluent was used to desorb technetium throughout the process, and the separation of molybdenum and technetium was realized. The recoveries of 99Tcm were more than 90%. The obtained sodium pertechnetate ［99Tcm］ injection met the requirements of the Chinese Pharmacopoeia without pH adjustation, and the labeling rate of MIBI and MDP for met the Chinese Pharmacopoeia claim. The results show that the extraction of 99Tcm from 99Mo with low specific activity (<0.2 Ci/g Mo), independent intellectual property rights and obvious advantages is formed, which provides technical reserves for potential methods of preparing 99Tcm.

Keywords

• activated carbon fiber
• neutral molybdenum solution
• technetium
• neutron capture
• accelerator