This part of GB/T 4324 specifies the determination method for lead content in tungsten powder, tungsten bar, tungsten carbide, tungsten trioxide, tungstic acid, blue tungsten, purple tungsten, ammonium paratungstate and ammonium metatungstate. This part is applicable to the determination of lead content in tungsten powder, tungsten bar, tungsten carbide, tungsten trioxide, tungstic acid, blue tungsten, purple tungsten, ammonium paratungstate and ammonium metatungstate. The measuring range is 0.00030%~0.0050%.
GB/T 4324.1-2012 history
2012GB/T 4324.1-2012 Methods for chemical analysis of tungsten.Part 1:Determination of lead content.Flame atomic absorption spectrometry
1984GB/T 4324.1-1984 Methods for chemical analysis of tungsten--The square wave polarographic method for the successive determination of lead and cadmium contents