GB/T 3654.3-2019
Ferroniobium—Determination of silicon content—Gravimetric method
GB/T 3654.10-2024
Ferroniobium—Determination of aluminum content—EDTA titrimetric method
GB/T 3654.8-2023
Ferroniobium—Determination of titanium content—Chromotropic acid photometric method and diantipyrylmethane photometric method
GB/T 20975.37-2020
Methods for chemical analysis of aluminium and aluminium alloys—Part 37:Determination of niobium content
GB/T 6730.47-2017e
Iron ores—Determination of niobium content—Sulfochlorophenol S spectrophotometric method
GB/T 6730.47-2017
Iron ores—Determination of niobium content—Sulfochlorophenol S spectrophotometric method
GB/T 3654.2-2008
Ferroniobium - Determination of copper content - The neocuproine-choroform extraction photometric method
GB/T 223.40-2007
Iron, steel and alloy - Determination of niobium content - The sulphochlorophenol S spectrophotometric method
GB/T 3654.8-2008
Ferroniobium—Determination of tianiun content—Chromotropic acid photometric method
GB/T 3654.6-2008
Ferroniobium - Determination of sulfur content - Combustion-iodate titrimetric method,methylene blue photometric method and infrared absorption method
DZ/T 0453.1-2023
KS E 3916-2011(2016)
Determination of niobium in titanium ores
DZ/T 0453.3-2023
GB/T 5124.5-2024
Methods for chemical analysis of hardmetals—Part 5:Determination of tantalum and niobium content—Inductively coupled plasma emission spectrometry
DZ/T 0453.2-2023
KS D 1825-2023
Iron and steel — Methods for determination of niobium content
YB/T 4395-2014
Steel-Determination of molybdenum,niobium and tungsten contents - Inductively coupled plasma atomic emission spectrometric method
20241619-T-605
Ferroniobium-Determination of niobium,tantalum,silicon, phosphorus,aluminium contents-Wavelength dispersive X-ray fluorescence spectrometric (fused cast bead method)
T/CSTM 00015-2019
JIS G 1237:1997
Iron and steel -- Methods for determination of niobium content