GB/T 24485-2009
Niobium carbide powder
GB/T 26061-2010
Tantalum-niobium composite carbides
GB/T 6730.47-2017(\u82f1\u6587\u7248)
铁矿石 铌含量的测定 氯代磺酚S分光光度法
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 6730.30-2017(\u82f1\u6587\u7248)
铁矿石 铬含量的测定 二苯基碳酰二肼分光光度法
GB/T 34520.9-2021
Test methods of continuous silicon carbide fibers—Part 9:Carbon content
GB/T 34520.8-2021
Test methods of continuous silicon carbide fibers—Part 8:Oxygen content
JC/T 2783-2023
GB/T 6730.34-2017(\u82f1\u6587\u7248)
铁矿石 锡含量的测定 邻苯二酚紫-溴化十六烷基三甲胺分光光度法
GB/T 3654.8-2023
Ferroniobium—Determination of titanium content—Chromotropic acid photometric method and diantipyrylmethane photometric method
SN/T 0256-1993
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 41153-2021
Determination of boron, aluminum and nitrogen impurity content in silicon carbide single crystal—Secondary ion mass spectrometry
GB/T 3654.2-2008
Ferroniobium - Determination of copper content - The neocuproine-choroform extraction photometric method
YB/T 175-2017
Carborundum-Determination of silicon carbide—Hydrofluoric acid gravimetric method
GB/T 223.40-2007
Iron, steel and alloy - Determination of niobium content - The sulphochlorophenol S spectrophotometric method
JB/T 6647-2011