GB/T 4324.20-1984 Methods for chemical analysis of tungsten--The N-benzoyl-N-phenylhydroxylamine photometric method for the determination of vanadium content
This standard applies to the determination of vanadium in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. Measuring range: 0.00050~0.040%.
GB/T 4324.20-1984 history
2012GB/T 4324.20-2012 Methods for chemical analysis of tungsten.Part 20:Determination of vanadium content.Inductively coupled plasma atomic emission spectrometry
1984GB/T 4324.20-1984 Methods for chemical analysis of tungsten--The N-benzoyl-N-phenylhydroxylamine photometric method for the determination of vanadium content