1 Method I Direct Electrolytic-Atomic Absorption Spectrometry
1.1 Scope
This method specifies the determination methods for copper content in copper and copper alloys.
This method is applicable to the determination of copper content in copper and copper alloys. The determination scope is 50.00%~99.00%.
1.2 Principle
The test portion is dissolved by nitric acid and hydrofluoric acid to reduce nitrogen oxide with hydrogen peroxide, then the lead is added to reduce the platinum loss on the anode so that the copper is exhaled on platinum cathode by electrolysis and then stoved and weighed. The copper content remained in the electrolyte is determined with flame atomic absorption spectrometry.
Foreword I
1 Method I Direct Electrolytic-Atomic Absorption Spectrometry 1
2 Method II Potassium Permanganate Tellurium Oxide-Electrolytic-Atomic Absorption Spectrometry 5
3 Method III Electrolytic-spectrophotometric Method 9
Appendix A (Informative) Comparison of Chapter and Article Numbers between Method I of this Part and ISO 1554:1976 13
Appendix B (Informative) Technical Differences between Method I of this Part and ISO 1554:1976 and their Reasons 14
Appendix C (Informative) Comparison of Chapter and Article Numbers between Method III of this Part and ISO 1553:1976 15
Appendix D (Informative) Technical Differences between Method III of this Part and ISO 1553:1976 and their Reasons 16
