2004HB/Z 5218.1-2004 Methods for chemical analysis of aluminium alloys-Part 1:Determination of copper content by BCO spectrophotometric method
1970HB 5218.1-1995 Determination of Copper Content by BCO Spectrophotometric Method for Chemical Analysis of Aluminum Alloy
1989HB 5421-1989 General principles and general provisions of chemical analysis methods for metallic materials
1970HB 5218.1-1982 Determination of Copper Content by BCO Spectrophotometric Method for Chemical Analysis of Aluminum Alloy
HB 5218.1-1982 Determination of Copper Content by BCO Spectrophotometric Method for Chemical Analysis of Aluminum Alloy was changed to HB 5421-1989 General principles and general provisions of chemical analysis methods for metallic materials.