GB 223.54-1987 Methods for Chemical Analysis of Iron, Steel and Alloys by Flame Atomic Absorption Spectrophotometry for the Determination of Nickel Content (English Version)
2022GB/T 223.54-2022 Iron, steel and alloy—Determination of nickel content—Flame atomic absorption spectrometric method
1987GB 223.54-1987 Methods for Chemical Analysis of Iron, Steel and Alloys by Flame Atomic Absorption Spectrophotometry for the Determination of Nickel Content