This standard applies to the determination of arsenic in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. Measuring range: 0.00008 ~ 0.020%.
GB/T 4324.5-1984 history
2012GB/T 4324.5-2012 Methods for chemical analysis of tungsten.Part 5:Determination of arsenic content.Hydrogenate atomic absorption spectrometry
1984GB/T 4324.5-1984 Methods for chemical analysis of tungsten--The molybdenum blue photometric method for the determination of arsenic content