This standard applies to the determination of calcium content in iron ore, iron concentrate, sinter and pellets. Measuring range: 1.50 to 15.0%.
GB/T 6730.13-1986 history
2007GB/T 6730.13-2007 Iron ores.Determination of calcium and magnesium content.EGTA-CyDTA titrimetric method
1986GB/T 6730.13-1986 Methods for chemical analysis of iron ores--The potassium permanganate volumetric method for the determination of calcium content