GB/T 13747.20-2017 Methods for chemical analysis of zirconium and zirconium alloys—Part 20:Determination of hafnium content—Inductively coupled plasma atomic emission spectrometry (English Version)
2017GB/T 13747.20-2017 Methods for chemical analysis of zirconium and zirconium alloys—Part 20:Determination of hafnium content—Inductively coupled plasma atomic emission spectrometry
1992GB/T 13747.20-1992 Zirconium and zirconium alloys--Determination of hafnium content--Emission spectrographic method