This standard applies to the determination of bismuth content in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. Measuring range: 0.00008 ~ 0.0040%.
GB/T 4324.2-1984 history
2012GB/T 4324.2-2012 Methods for chemical analysis of tungsten.Part 2:Determination of bismuth content.Hydrogenate atomic absorption spectrometry
1984GB/T 4324.2-1984 Methods for chemical analysis of tungsten--The potassium iodide-brucine photometric method for the determination of bismuth content