GB/T 4324.18-2012 Methods for chemical analysis of tungsten.Part 18:Determination of potassium content.Flame atomic absorption spectrometry (English Version)
This part of GB/T 4324 specifies the determination method of potassium in tungsten powder, tungsten bar, tungsten carbide, tungsten trioxide, blue tungsten, purple tungsten, tungstic acid, ammonium paratungstate, ammonium metatungstate. This part applies to tungsten powder , Determination of potassium content in tungsten bars, tungsten carbide, tungsten trioxide, blue tungsten, purple tungsten, tungstic acid, ammonium paratungstate, ammonium metatungstate, the determination range is 0.000 5%~0.080%,
GB/T 4324.18-2012 history
2012GB/T 4324.18-2012 Methods for chemical analysis of tungsten.Part 18:Determination of potassium content.Flame atomic absorption spectrometry
1984GB/T 4324.18-1984 Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of potassium content