This standard specifies the method for the determination of calcium content in aluminum and aluminum alloys. This standard applies to the determination of calcium content in aluminum and aluminum alloys. Measuring range: 0.01% to 0.30%.
GB/T 6987.21-2001 history
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
GB/T 6987.21-2001 Aluminium and aluminium alloys--Determination of calcium content--Fiame atomic absorption spectrometric method was changed to GB/T 20975.21-2008 Methods for chemical analysis of aluminium and aluminium alloys.Part 21:Determination of calcium content.Flame atomic absorption spectrometric method.