GB/T 8654.1-2007
金属锰 锰硅合金 锰铁和氮化锰铁 铁含量的测定 邻二氮杂菲分光光度法和三氯化钛-重铬酸钾滴定法
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