YB/T 159.6-1999 Methods for chemical analysis of titanium concentrate (rock minerals).The EGTA-CyDTA volumetric method for the determination of calcium oxide and magnesium oxide content (English Version)
2015YB/T 159.6-2015 Titanium concentrate(rock minerals).Determination of calciumoxide and magnesium oxide content.The EGTA-CyDTA titrimetric method
1999YB/T 159.6-1999 Methods for chemical analysis of titanium concentrate (rock minerals).The EGTA-CyDTA volumetric method for the determination of calcium oxide and magnesium oxide content