Method 1: This method specifies the determination method of copper content in aluminum and aluminum alloys. This method is applicable to the determination of copper content in aluminum and aluminum alloys. Measuring range: 0.0005% to 0.012%. Method 2: This method specifies the determination method of copper content in aluminum and aluminum alloys. This method is applicable to the determination of copper content in aluminum and aluminum alloys. Measuring range: 0.0050% to 8.00%. Method 3: This method specifies the determination method of copper content in aluminum and aluminum alloys. This method is applicable to the determination of copper content in aluminum and aluminum alloys. Measuring range: ≥0.50%. a) Alloys containing tin or antimony (see Appendix C). b) Alloys containing bismuth (see Appendix D). Method 4: This method specifies the determination method of copper content in aluminum and aluminum alloys. This method is applicable to the determination of copper content in aluminum and aluminum alloys. Measuring range: 0.002% to 0.8%. This method is not applicable to special cases where the silicon content in the alloy is higher than 1%, which should be modified as described in Appendix E.
GB/T 20975.3-2008 history
2020GB/T 20975.3-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 3:Determination of copper content
2008GB/T 20975.3-2008 Methods for chemical analysis of aluminium and aluminium alloys.Part 3: Determination of copper content
2001GB/T 6987.29-2001 Aluminium and aluminium alloys--Determination of copper content-2,9-Dimethyl-1,10-phenanthroline spectrophotometric method
GB/T 20975.3-2008 Methods for chemical analysis of aluminium and aluminium alloys.Part 3: Determination of copper content has been changed from GB/T 6987.29-2001 Aluminium and aluminium alloys--Determination of copper content-2,9-Dimethyl-1,10-phenanthroline spectrophotometric method.