GB/T 4324.12-1984 Methods for chemical analysis of tungsten--The chloritization-molybdenum blue photometric method for the determination of silicon content
This standard is applicable to the determination of silicon content in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. Measuring range: 0.0005~0.030%.
GB/T 4324.12-1984 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