GB/T 8151.6-1987 Methods for chemical analysis of zinc concentrates--The atomic absorption spectrophotometric method for the determination of copper content
2012GB/T 8151.6-2012 Methods for chemical analysis of zinc concentrates.Part 6:Determination of copper content.The flame atomic absorption spectrometric method
2000GB/T 8151.6-2000 Methods for chemical analysis of zinc concentrates -Determination of copper content
1987GB/T 8151.6-1987 Methods for chemical analysis of zinc concentrates--The atomic absorption spectrophotometric method for the determination of copper content