GB/T 8654.1-1988 Methods for chemical analysis of manganese metal--The ortho-phenanthroline photometric method for the determination of iron content (English Version)
This standard applies to the determination of the amount of iron in electrolytic manganese metal. Measuring range: 0.001% to 0.31%.
GB/T 8654.1-1988 history
2007GB/T 8654.1-2007 Manganese metal,ferromanganese-silicon,ferromanganese and nitrogen-bearing ferromanganese Determination of iron content The ortho-phenanthrdine spectrophotometric method and the titanium trichloride-potassium dichromate titrimetric method
1988GB/T 8654.1-1988 Methods for chemical analysis of manganese metal--The ortho-phenanthroline photometric method for the determination of iron content