GB/T 6730.25-1986 Methods for chemical analysis of iron ores--The gravimetric method for the determination of rare earth elements content (English Version)
This standard applies to the determination of the total amount of rare earth in iron ore, iron concentrate, sinter and pellets. Measuring range: 0.500~8.00%.
GB/T 6730.25-1986 history
2021GB/T 6730.25-2021 Iron ores—Determination of total rare earth contents—Oxalate gravimetric method
2006GB/T 6730.25-2006 Iron ores Determination of total rare earth contents Oxalate gravimetric method
1986GB/T 6730.25-1986 Methods for chemical analysis of iron ores--The gravimetric method for the determination of rare earth elements content