Warning: Personnel using this part of GB/T 6730 should have practical experience in formal laboratory work. This section does not address all possible security issues. It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations. This part of GB/T 6730 specifies the chlorophosphine azo mA spectrophotometric method for the determination of the total amount of rare earths. This section applies to the determination of the total amount of rare earths (expressed as oxides) in natural iron ores, iron concentrates and lump ores, including sintered products. The measurement range (mass fraction) is 0.020 to 1.00%.
GB/T 6730.24-2006 Referenced Document
GB/T 10322.1 Iron ore sampling and sample preparation methods*, 2023-08-06 Update
GB/T 12808 Laboratory glass instrument single marked line pipette*, 2016-07-01 Update
GB/T 6682 Water for analytical laboratory use.Specification and test methods*, 2008-05-15 Update
GB/T 6730.1 Iron ores.Preparation of predried test samples for chemical analysis*, 2016-02-24 Update
GB/T 6730.24-2006 history
2006GB/T 6730.24-2006 Iron ores Determination of total rare earth contentd Chlorophosphonazo mA spectrophotometric method
1986GB/T 6730.24-1986 Methods for chemical analysis of iron ores--The arsenazo 3 photometric method for the determination of rare earth elements content