GB/T 4324.3-1984 Methods for chemical analysis of tungsten--The polyethylene glycol octyl phenyl ether-phenylfluorone photometric method for the determination of tin content
This standard is applicable to the determination of tin content in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. Measuring range: 0.00005~0.0040%.
GB/T 4324.3-1984 history
2012GB/T 4324.3-2012 Methods for chemical analysis of tungsten.Part 3:Determination of tin content.Hydrogenate atomic absorption spectrometry
1984GB/T 4324.3-1984 Methods for chemical analysis of tungsten--The polyethylene glycol octyl phenyl ether-phenylfluorone photometric method for the determination of tin content