GB/T 4324.21-2012 Methods for chemical analysis of tungsten—Part 21:Determination of chromium content—Inductively coupled plasma atomic emission spectrometry

GB/T 4324.1-2012 Methods for chemical analysis of tungsten—Part 1:Determination of lead content—Flame atomic absorption spectrometry GB/T 4324.2-2012 Methods for chemical analysis of tungsten—Part 2:Determination of bismuth content—Hydrogenate atomic absorption spectrometry GB/T 4324.3-2012 Methods for chemical analysis of tungsten—Part 3:Determination of tin content—Hydrogenate atomic absorption spectrometry GB/T 4324.4-2012 Methods for chemical analysis of tungsten—Part 4:Determination of antimony content—Hydrogenate atomic absorption spectrometry GB/T 4324.5-2012 Methods for chemical analysis of tungsten—Part 5:Determination of arsenic content—Hydrogenate atomic absorption spectrometry GB/T 4324.6-2012 Methods for chemical analysis of tungsten—Part 6:Determination of iron content—1,10-phenanthroline spectrophotometry GB/T 4324.7-2012 Methods for chemical analysis of tungsten—Part 7:Determination of cobalt content—Inductively coupled plasma atomic emission spectrometry GB/T 4324.9-2012 Methods for chemical analysis of tungsten—Part 9:Determination of cadmium content—Inductively-coupled plasma atomic emission spectrometry and flame atomic absorption spectrometry GB/T 4324.10-2012 Methods for chemical analysis of tungsten—Part 10:Determination of copper content—Flame atomic absorption spectrometry GB/T 4324.11-2012 Methods for chemical analysis of tungsten—Part 11:Determination of aluminum content—Inductively coupled plasma atomic emission spectrometry GB/T 4324.12-2012 Methods for chemical analysis of tungsten—Part 12:Determination of silicon content—Chlorization-molybdenum blue spectrophotometry GB/T 4324.14-2012 Methods for chemical analysis of tungsten—Part 14:Determination of residue content after chloride volatility—Gravimetric method GB/T 4324.16-2012 Methods for chemical analysis of tungsten—Part 16:Determination of loss content on ignition—Gravimetric method GB/T 4324.17-2012 Methods for chemical analysis of tungsten—Part 17:Determination of sodium content—Flame atomic absorption spectrometry GB/T 4324.18-2012 Methods for chemical analysis of tungsten—Part 18:Determination of potassium content—Flame atomic absorption spectrometry GB/T 4324.19-2012 Methods for chemical analysis of tungsten—Part 19:Determination of titanium content—The diantipyrylmethane photometric spectrophtometry GB/T 4324.20-2012 Methods for chemical analysis of tungsten—Part 20:Determination of vanadium content—Inductively coupled plasma atomic emission spectrometry GB/T 4324.22-2012 Methods for chemical analysis of tungsten—Part 22:Determination of manganese content—Inductively coupled plasma atomic emission spectrometry GB/T 4324.23-2012 Methods for chemical analysis of tungsten—Part 23:Determination of sulfur content—The combustion-conductometric titration and high frequency combustion-infrared absorption method GB/T 4324.24-2012 Methods for chemical analysis of tungsten—Part 24:Determination of phosphorus content—Molybdemum blue photometry GB/T 4324.25-2012 Methods for chemical analysis of tungsten—Part 25:Determination of oxygen content—Pulse heating inert gas fusion-infrared absorption method 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 GB/T 4324.27-2012 Methods for chemical analysis of tungsten—Part 27:Determination of carbon content—High frequency combustion-infrared absorption method GB/T 4324.28-2012 Methods for chemical analysis of tungsten—Part 28:Determination of molybdenum content—The thioyanate spectrophotometry

GB/T 4324.21-1984 Methods for chemical analysis of tungsten--The diphenylcarbazide photometric method for the determination of chromium content