This part of GB/T 6730 specifies the acid-base titration method for the determination of phosphorus content. This section applies to the determination of phosphorus content in iron ore, iron concentrate, sinter and pellets. Measuring range (mass fraction): 0.030%~3.0%.
GB/T 6730.20-2016 Referenced Document
GB/T 10322.1 Iron ores—Sampling and sample preparation procedures
GB/T 12808 Laboratory glass instrument single marked line pipette
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 6730.1 Iron ores.Preparation of predried test samples for chemical analysis
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 6730.20-2016 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