GB/T 5686.1-2008
锰铁、锰硅合金、氮化锰铁和金属锰.锰含量的测定.电位滴定法、硝酸铵氧化滴定法及高氯酸氧化滴定法
Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal. Determination of manganese content. Potentiometric method and titrimetric mothod after ammonium nitrate & perchloric acid oxidation