GB/T 20975.20-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 20:Determination of gallium content—Butyrhodamine B spectrophotometric method
2020GB/T 20975.20-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 20:Determination of gallium content—Butyrhodamine B spectrophotometric method
2008GB/T 20975.20-2008 Methods for chemical analysis of aluminium and aluminium alloys.Part 20:Determination of gallium content.Butyrhodamine B spectrophotometric method
2001GB/T 6987.20-2001 Aluminium and aluminium alloys--Determination of gallium content--Butyrhodamine B spectrophotometric method