Abstract
The stability of Xe-127 in unit dose vials—filled and stored under various conditions—was studied. Vials stored for 40 days retained between 50% and 98% of the original xenon, depending upon the type of rubber closure used. Puncturing the closures during vialfilling had no effect upon retention, with two exceptions. Highest retention was found with synthetic rubber closures and vials stored under refrigeration. Natural rubber closures were unsatisfactory and carrier xenon had little effect upon retarding xenon loss. Vial activity sorbed to rubber closures varied between 1% and 6% and teflon-facing had no effect in retarding xenon loss.
