This standard is applicable to the determination of copper content in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. Measuring range: 0.0003% to 0.0030%.
GB/T 4324.10-1984 history
2012GB/T 4324.10-2012 Methods for chemical analysis of tungsten.Part 10:Determination of copper content.Flame atomic absorption spectrometry
1984GB/T 4324.10-1984 Methods for chemical analysis of tungsten--The neocuproine photometric method for the determination of copper content