This standard is applicable to the determination of nickel content in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. Measuring range: 0.0004~0.01%.
GB/T 4324.8-1984 history
2012GB/T 4324.28-2012 Methods for chemical analysis of tungsten.Part 28:Determination of molybdenum content.The thioyanate spectrophotometry
2008GB/T 4324.8-2008 Methods for chemical analysis of tungsten.Determination of nickel content.The inductively coupled plasma atomic emission spectrometry、flame atomic absorption spectrometry and dimethylglyoxime gravimetry
1984GB/T 4324.8-1984 Methods for chemical analysis of tungsten--The dimethylglyoxime photometric method for the determination of nickel content