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Evaluation of Inorganic Adsorbents for the Rubidium-82 Generator: I. Hydrous SnO₂

The Squibb Institute for Medical Research, Princeton, New Jersey
Los Alamos National Laboratory, Los Alamos, New Mexico

Correspondence: For reprints contact: R. D. Neirinckx, PhD, The Squibb Institute for Medical Research, Radiopharmaceutical R & D, E. R. Squibb & Sons, New Brunswick, NJ 08903.

ABSTRACT

An Sr-82Rb-82 generator based on the inorganic adsorbent hydrous tin oxide is described. K_D values for Sr(II) were determined as a function of pH, equilibration time, and Sr(II) carrier content. The K_D values for Rb(I) were determined as a function of salt concentration. Elution of a generator of 2-cc bed size with isotonic saline allows Rb-82 collection in 13 ml with radiochemical yields of 65%. Strontium breakthrough is less than 10^–9/ml for elution speeds of up to 60 ml/min.