This part of GB/T 20975 specifies the determination of calcium content in aluminum and aluminum alloys using flame atomic absorption spectrometry and Na*EDTA titration. This section applies to the arbitration determination of calcium content in aluminum and aluminum alloys. The measurement range of flame atomic absorption spectrometry: 0.010%% to 1.00%; the measurement range of NasEDTA titration method: 4.00% to 30.00%%.
GB/T 20975.21-2020 Referenced Document
GB/T 8005.2 Terms of aluminium and aluminium alloys—Part 2:Chemical analysis
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 20975.21-2020 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