This standard specifies methods for the determination of manganese content in ferrotungsten, including the periodate Spectrophotometric method, spec-trophotometry and flame atomic absorption spectroscopy (AAS), which are suitable for samples with manganese content ranging from 0.05% to 0.70%. The standard describes in detail the preparation of the sample, the use of reagents and the operation steps to be followed during the determination process to ensure the accuracy and repeatability of the measurement results. The standard provides a scientific basis for the mass detection of ferrotungsten products and is an important tool for quality control in related fields.