GB/T 8704.5-2007 provides the ferrous sulfate ammonium Titrimetric method and the potential Titrimetric method to determine the vanadium content in ferrovanadium. It is suitable for all kinds of ferrovanadium products. The ferrous sulfate ammonium Titrimetric method is based on oxidation reduction reaction, and the potential Titrimetric method determines the endpoint by monitoring the titration potential change. The standard specifies the instruments required for the two methods, such as Burette, Potentiometric titrator, etc., and specifies the preparation of reagents. Detailed description of Sample Handling steps, including dissolve, oxidation and other operations. Standardize the titration process, according to this standard, the vanadium content can be accurately determined, providing key data for the mass evaluation of vanadium and the control of the amount of vanadium element added in iron and steel smelting,