GB/T 20975.3-2020 Active
GB/T 20975.3-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 3:Determination of copper content
Abstract
This part of GB/T 20975 specifies the determination of copper content in aluminum and aluminum alloys by the Neocuproine spectrophotometry, flame atomic absorption spectrometry, and sodium thiosulfate titration methods.
This part is applicable to the arbitral determination of copper content in aluminum and aluminum alloys. The determination range of Neocuproine spectrophotometry is 0.000 5% to 0.012%; the determination range of flame atomic absorption spectrometry is 0.005 0% to 8.00%; and the determination range of sodium thiosulfate titration is 3.00% to 70.00%.
Note: When the copper mass fraction is 0.005 0% to 0.012%, the Neocuproine spectrophotometry is used as the arbitral testing method; when the copper mass fraction is 3.00% to 8.00%, the flame atomic absorption spectrometry is used as the arbitral testing method.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 20975.3-2020 |
| CCS | Analysis methods for light metals and their alloys |
| ICS | Aluminum and aluminum alloys |
| Implement Date | 2021-04-01 |