GB/T 1506-2002 specifies two methods for the determination of manganese content in manganese ores, namely the potential Titrimetric method and the ferrous sulfate ammonium Titrimetric method. It is suitable for all kinds of manganese ore samples. The potential Titrimetric method determines the endpoint by measuring the change of potential during titration; the ferrous sulfate ammonium Titrimetric method is based on oxidation reduction reaction determination. The standard specifies the required instruments, such as Potentiometric titrator, Burette, etc., and specifies the preparation of reagents. Detailed description of Sample Handling steps, including dissolving and separating interfering elements. Standardize the operation procedures of the two titration methods. According to this standard, the manganese content can be accurately determined, providing key data for the mass evaluation of manganese ore and the design of smelting process