GB/T 6730.38-1986 Methods for chemical analysis of iron ores--The nitroso-R salt photometric method for the determination of cobalt content (English Version)
This standard applies to the determination of the amount of cobalt in iron ore, iron concentrate, sinter and pellets. Measuring range: 0.020~0.500%.
GB/T 6730.38-1986 history
2017GB/T 6730.37-2017 Iron ores—Determination of cobalt content—4-[(5-chloro-2-pyridyl)azo]-1,3-diamino-benzene spectrophotometric method
1986GB/T 6730.37-1986 Methods for chemical analysis of iron ores--The 4-[(5-chloro-2-pyridyl)azo]-1,3-diaminobenzene photometric method for the determination of cobalt content