Undesirable metal cation contaminants, including hafnium, can be reduced
from a solution containing Lutetium-177 on a bed of an anion exchange
resin. The thus purified solution can be stored and transported in a
polypropylene vial, to prevent the possibility of hafnium entering the
solution from a glassware wall and of Lutetium from being lost from the
solution by chemically reacting with a glassware wall. The vial can be
sealed with a rubber stopper which has a polytetrafluoroethylene coating
facing the solution to prevent the possibility of contaminants which
could interfere with later uses of the Lutetium-177 from leaching into
the solution from the rubber stopper. Recipients of the
Lutetium-177-containing vial can be provided with a prepackaged column of
the anion exchange resin to enable such recipients to remove the hafnium
which accumulated in the solution as a product of radioactive decay
during shipment.