The standard specifies a 2,2'-diquinolyl spectrophotometric method for the determination of copper in steel and cast iron. The method is applicable to copper contents between 0,02 and 5% (m/m).
DS/ISO 4946:1991 history
1991DS/ISO 4946:1991 Steel and cast iron. Determination of copper content. 2,2'. Diquinolyl spectrophotometric method