GB/T 4324.26-2012 Methods for chemical analysis of tungsten.Part 26:Determination of nitrogen content.Pulse heating inert gas fusion-thermal conductive method and the Nessler reagent spectrophotometry (English Version)
This part of GB/T 4324 specifies the determination method of nitrogen content in tungsten powder and tungsten rod. This section applies to the determination of the amount of nitrogen in tungsten. The measurement range of method 1 is 0.000 5%~0.040%; the measurement range of method 2 is 0.001 0%~0.005 0%.
GB/T 4324.26-2012 history
2012GB/T 4324.26-2012 Methods for chemical analysis of tungsten.Part 26:Determination of nitrogen content.Pulse heating inert gas fusion-thermal conductive method and the Nessler reagent spectrophotometry
1984GB/T 4324.26-1984 Methods for chemical analysis of tungsten--The Nessler reagent photometric method for the determination of nitrogen content