This part of GB/T 5070 specifies the method for determining the amount of magnesium oxide by EDTA volumetric method. This section applies to the determination of the amount of magnesium oxide in magnesia-chrome refractories. The measurement range (mass fraction) is 30.00% to 96.00%.
GB/T 5070.9-2002 history
2015GB/T 5070-2015 Chemical analysis of refractories containing chrome
2007GB/T 5070-2007 Chemical analysis of refractories containing chrome
2002GB/T 5070.9-2002 Chemical analysis of magnesia chromite refractories--Part 9: Determination of magnesium oxide--EDTA volumetric method
GB/T 5070.9-2002 Chemical analysis of magnesia chromite refractories--Part 9: Determination of magnesium oxide--EDTA volumetric method was changed to GB/T 5070-2007 Chemical analysis of refractories containing chrome.