This standard specifies the determination method of alumina content in bauxite ore. This standard is applicable to the determination of alumina content in bauxite ore, the determination range: 40% to 80%.
GB/T 3257.1-1999 history
1999GB/T 3257.1-1999 Methods for chemical analysis of bauxite--Determination of aluminium oxide content-EDTA titrimetric method
GB/T 3257.1-1999 Methods for chemical analysis of bauxite--Determination of aluminium oxide content-EDTA titrimetric method was changed to YS/T 575.1-2006 Determination of Alumina Amount by EDTA Titration Method for Chemical Analysis of Bauxite Ore.