GB/T 4324.6-2012 Methods for chemical analysis of tungsten.Part 6:Determination of iron content.1,10-phenanthroline spectrophotometry (English Version)
This part of GB/T 4324 specifies the method for the determination of titanium content in tungsten. This part is applicable to the determination of iron content in tungsten powder, tungsten bar, tungsten trioxide, blue tungsten, purple tungsten, tungstic acid, ammonium metatungstate, ammonium paratungstate and carbides. The determination range is 0.0005% to 0.10%.
GB/T 4324.6-2012 history
2012GB/T 4324.6-2012 Methods for chemical analysis of tungsten.Part 6:Determination of iron content.1,10-phenanthroline spectrophotometry
1984GB/T 4324.6-1984 Methods for chemical analysis of tungsten--The ortho-phenanthroline photometric method for the determination of iron content