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 oxalate gravimetric 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 0.500% to 10.00%.
GB/T 6730.25-2006 Referenced Document
GB/T 10322.1 Iron ore sampling and sample preparation methods*, 2023-08-06 Update
GB/T 12690.12 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides-Determination of thorium content-Arsenazo III spectrophotometric method and inductively coupled plasma mass spectrum method