This standard specifies the method for the determination of lead content in copper and copper alloys. This standard applies to the determination of lead content in copper and copper alloys, with a determination range of 0.0015% to 5.00%.
GB/T 5121.9-1996 history
2008GB/T 5121.9-2008 Methods for chemical analysis of copper and copper alloys.Part 9:Determination of iron content
1996GB/T 5121.9-1996 Copper and copper alloys--Determination of iron content