2020GB/T 20975.21-2020 Methods for chemical analysis of aluminium and aluminium alloy—Part 21: Determination of calcium content
2008GB/T 20975.21-2008 Methods for chemical analysis of aluminium and aluminium alloys.Part 21:Determination of calcium content.Flame atomic absorption spectrometric method
2001GB/T 6987.21-2001 Aluminium and aluminium alloys--Determination of calcium content--Fiame atomic absorption spectrometric method