GB/T 4324.11-1984 Methods for chemical analysis of tungsten--The chromazurol S photometric method for the determination of aluminum content (English Version)
This standard is applicable to the determination of aluminum content in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. Measuring range: 0.0005~0.025%.
GB/T 4324.11-1984 history
2012GB/T 4324.11-2012 Methods for chemical analysis of tungsten.Part 11:Determination of aluminum content.Inductively coupled plasma atomic emission spectrometry
1984GB/T 4324.11-1984 Methods for chemical analysis of tungsten--The chromazurol S photometric method for the determination of aluminum content