This paper describes a procedure for the separation of

57

Co for Mössbauer source. The

57

Co was obtained by

56

Fe (d

n)

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Co reaction. The irradiated iron target is etched with 9N HC1 until essentially all the activity is transfered into solution 15% H

2

O

2

is added to oxidize iron to ferric state. The solution is evaporated nearly to dryness. The resulting Fe (III) is dissolved in 4N HC1. Iron is extracted with Tributyl phosphate. The hydrochloric solution again evaporated nearly to dryness then it is dissolved in 9N HC1 and passed through a 717 ion exchanger column. 4N HC1 solution is choosed as eluant for

57

Co. The recovery of

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Co is over 95%.