GB/T 5686.5-2008
锰铁、锰硅合金、氮化锰铁和金属锰.碳含量的测定.红外线吸收法、气体容量法、重量法和库仑法
Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal. Determination of carbon content. The infrared absorption method, the gasometric method, the gravimetric and the coulometric method