This standard is applicable to the determination of sodium content in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. Measuring range: 0.0010~0.080%.
GB/T 4324.17-1984 history
2012GB/T 4324.17-2012 Methods for chemical analysis of tungsten.Part 17:Determination of sodium content.Flame atomic absorption spectrometry
1984GB/T 4324.17-1984 Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of sodium content