GB/T 4 2513.5-2023 is aimed at the determination of vanadium content in nickel alloys. It provides one-oxidation dinitrogen-flame atomic absorption spectroscopy (AAS) method and Inductance coupled plasma atomic emission spectroscopy (AES) method. The standard specifies the scope of application, specifies the principle of the two determination methods, the required equipment, reagent materials, and specifies the preparation of the sample, the test procedure and the calculation of the result. According to this standard, the vanadium content in nickel alloys can be accurately determined, providing reliable data for the mass control of nickel alloys, performance research and application in aerospace, chemical industry and other fields, and helping related industries to ensure product mass.