SN/T 0962-2010
Determination of sodium tungstate content in sodium tungstate for import and export
SN/T 0962-2000
Method for the determination of sodium tungstate content in sodium tungstate for import and export
GB/T 6150.1-2023
Methods for chemical analysis of tungsten concentrates—Part 1:Determination of tungsten trioxide content—Ammonium tungstate igniting gravimetric method
YS/T 1650-2023
SN/T 0951-2010
Determination of tungsten trioxide content in ammonium paratungstate for import and export
SN/T 3012-2011
Determination of tungsten trioxide in tungsten ores-X-ray fluorescence spectrometry
GB/T 7731.1-2021
Ferrotungsten—Determination of tungsten content—Cinchonine gravimetric method and ammonium nitrate gravimetric method
YS/T 1562.2-2022
YS/T 1585.2-2022
GB/T 4324.2-2023
Methods for chemical analysis of tungsten—Part 2:Determination of bismuth and arsenic contents
SJ 20963-2006
Method for determination the content of rhenium of tungsten-rhenium alloy
YS/T 1603.1-2023
GB/T 223.43-2008
Iron, steel and alloy - Determination of tungsten content - Gravimetryc method and spectrophotometric method
GB/T 6150.6-2023
Methods for chemical analysis of tungsten concentrates—Part 6:Determination of moisture content—Gravimetric method
GB/T 6150.17-2022
Methods for chemical analysis of tungsten concentrates—Part 17:Determination of antimony content—Atomic fluorescence spectrometry
T/SDHCIA 035-2023
YS/T 1489.3-2021
YS/T 1289-2018
Determination of lanthanum oxide in tungsten-Ianthanum alloys-Na2EDTA titration method
GB/T 6150.4-2023
Methods for chemical analysis of tungsten concentrates—Part 4:Determination of sulfur content—High frequency-infrared absorption method and combustion-iodometric method
JB/T 4107.4-2014
Chemical analyse method for electrical contact materials - Part 4:Determination of silver content in the silver-tungsten