GB/T 13840-1992
Abolished
GB/T 12690.4-2021
Active
National standards
GB/T 12690.4-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 4:Determination of oxygen and nitrogen contents—Impulse-infrared absorption and impulse-thermal conductivity method
GB/T 12690.4-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 4:Determination of oxygen and nitrogen contents—Impulse-infrared absorption and impulse-thermal conductivity method
Price:
$ 50
Basic Information
Standard Code:
GB/T 12690.4-2021
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Analysis methods for rare metals and their alloys
ICS Name:
Other non-ferrous metals and their alloys
Publish Date:
2021-10-11
Implement Date:
2022-05-01
Pages:
7 pages
Scope
This document specifies the method for determining the oxygen and nitrogen content in rare earth metals (except ytterbium).
This document is applicable to the determination of the oxygen and nitrogen content in rare earth metals (except ytterbium). The measurement range (mass fraction): oxygen 0.005% to 0.30%; nitrogen 0.002% to 0.20%.
Development Information
Same series standard
GB/T 12690.7-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 7:Determination of silicon content
GB/T 12690.8-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 8:Determination of sodium content
Replace the following standards
Referenced Standards
Related Standards
GB/T 15677-1995
Replaced
GB/T 15677-1995 Lanthanum metal
GB/T 3136-1995
abolished_transferred
GB/T 3136-1995 Tantalum powders
GB/T 3463-1995
Abolished
GB/T 3463-1995 Tantalum wires
GB/T 3628-1995
Replaced
GB/T 3628-1995 Tantalum and tantalum alloy foils
GB/T 16476-1996
Replaced