GB/T 223.54 - 2022 is for the determination of nickel content in steel and alloys. The standard adopts flame atomic absorption spectroscopy (AAS) method, which is suitable for all kinds of steel and alloy products. It clearly states the determination principle, puts forward requirements for the performance and parameters of instruments and equipment, specifies the selection and preparation of reagents, and specifies the process of each step from the collection and processing of samples to the final determination. The measurement range is clear, which can accurately detect the nickel content in steel and alloys, and provides key detection methods and unified standards for the mass control and performance evaluation of steel and alloy products.