2016DIN EN ISO 4946:2016-08 Steel and cast iron - Determination of copper - 2,2'-Biquinoline spectrophotometric method (ISO 4946:2016); German version EN ISO 4946:2016
2016DIN EN ISO 4946:2016 Steel and cast iron - Determination of copper - 2,2'-Biquinoline spectrophotometric method (ISO 4946:2016)
1970DIN EN ISO 4946 E:2014-08 Determination of copper in steel and cast iron by 2,2' biquinoline spectrophotometric method (draft)