GB/T 4324.7-2012 Methods for chemical analysis of tungsten.Part 7:Determination of cobalt content.Inductively coupled plasma atomic emission spectrometry (English Version)
This part of GB/T 4324 specifies the determination method of cobalt content in tungsten powder, tungsten bar, tungsten trioxide, blue tungsten, purple tungsten, tungsten carbide, tungstic acid, ammonium metatungstate and ammonium paratungstate. This part is applicable to the determination of cobalt content in tungsten powder, tungsten bar, tungsten trioxide, blue tungsten, purple tungsten, tungsten carbide, tungstic acid, ammonium metatungstate, ammonium paratungstate, the determination range is 0.0001%~0.050%.
GB/T 4324.7-2012 history
2012GB/T 4324.7-2012 Methods for chemical analysis of tungsten.Part 7:Determination of cobalt content.Inductively coupled plasma atomic emission spectrometry
1984GB/T 4324.7-1984 Methods for chemical analysis of tungsten--The 5-cl-PADAB photometric method for the determination of cobalt content