GB/T 4 2513.4-2023 Determination of silicon content in focused nickel alloys. This standard provides two determination methods: one oxidation dinitrogen-flame atomic absorption spectroscopy (AAS) method and molybdenum blue Spectrophotometric method, spectrophotometry method. The principles of each method are described in detail, the requirements for equipment and reagent materials are specified, and the whole process from sample preparation, test operation to result calculation is standardized. According to this standard, the silicon content in nickel alloys can be accurately determined, providing key data support for mass monitoring and performance optimization of nickel alloys. It is widely used in aviation, electronics and other fields to help related industries improve product mass.