The present invention is directed to a generator apparatus for separating
a daughter gallium-68 radioisotope substantially free of impurities from
a parent gernanium-68 radioisotope, including a first resin-containing
column containing parent gernanium-68 radioisotope and daughter
gallium-68 radioisotope, a source of first eluent connected to said first
resin-containing column for separating daughter gallium-68 radioisotope
from the first resin-containing column, said first eluent including
citrate whereby the separated gallium is in the form of gallium citrate,
a mixing space connected to said first resin-containing column for
admixing a source of hydrochloric acid with said separated gallium
citrate whereby gallium citrate is converted to gallium tetrachloride, a
second resin-containing column for retention of gallium-68 tetrachloride,
and, a source of second eluent connected to said second resin-containing
column for eluting the daughter gallium-68 radioisotope from said second
resin-containing column.