2014GOST 13047.5-2014 Nickel. Cobalt. Methods for determination of nickel in cobalt
2002GOST 13047.5-2002 Nickel. Cobalt. Methods for determination of nickel in cobalt
1980GOST 741.5-1980 Cobalt. Method for the determination of nickel
0000 GOST 741.5-1969
GOST 741.5-1980 Cobalt. Method for the determination of nickel was changed to GOST 13047.5-2002 Nickel. Cobalt. Methods for determination of nickel in cobalt.