Abstract
Zone melting process usually limited to separation in the solid phase was examined to purify frozen aqueous solution by using a new zone melting technique developed by authors. This new process without movement of either sample tube or heaters enabled us to realize zone melting operation to the frozen aqueous solution.
Experiments of cobalt concentration in the aqueous phase showed 40% reduction of initial concentration with one zone path number. Therefore, more reduction of impurity concentration can be expected by increasing zone path number.
