This standard specifies the determination method of ferric oxide content in bauxite ore. This standard is applicable to the determination of ferric oxide content in bauxite ore, and the determination range is: ≥5.00%.
GB/T 3257.4-1999 history
1999GB/T 3257.4-1999 Methods for chemical analysis of bauxite--Determination of iron oxide content--Dichromate titrimetric method
GB/T 3257.4-1999 Methods for chemical analysis of bauxite--Determination of iron oxide content--Dichromate titrimetric method was changed to YS/T 575.4-2006 Bauxite ore chemical analysis method potassium dichromate titration method to determine the content of ferric oxide.