This standard applies to the determination of phosphorus in iron ore, iron concentrate, sinter and pellets. Measuring range: 0.030~3.000%.
GB/T 6730.20-1986 history
2016GB/T 6730.19-2016 Iron ores—Determination of phosphorus content—Bismuth phosphomolybdate blue spectrophotometric method
1986GB/T 6730.19-1986 Methods for chemical analysis of iron ores--The bismuth phosphomolybdate blue photometric method for the determination of phosphorus content