GB/T 4324.12-2012 Methods for chemical analysis of tungsten.Part 12:Determination of silicon content.Chlorization-molybdenum blue spectrophotometry (English Version)
This part specifies the determination method of silicon content in tungsten powder, tungsten bar, tungsten trioxide, blue tungsten, purple tungsten, tungsten carbide, tungstic acid, ammonium paratungstate and ammonium metatungstate. This part is applicable to the determination of silicon content in tungsten powder, tungsten bar, tungsten trioxide, blue tungsten, purple tungsten, tungsten carbide, tungstic acid, ammonium paratungstate and ammonium metatungstate. The measuring range is 0.0004%~0.030%.
GB/T 4324.12-2012 history
2012GB/T 4324.12-2012 Methods for chemical analysis of tungsten.Part 12:Determination of silicon content.Chlorization-molybdenum blue spectrophotometry
1984GB/T 4324.12-1984 Methods for chemical analysis of tungsten--The chloritization-molybdenum blue photometric method for the determination of silicon content