GB/T 15076.13-2017 Methods for chemical analysis of tantalum and niobium—Part 13:Determination of nitrogen content—Inert gas fusion thermal conductivity method (English Version)
GB/T 15076.13-2017 Methods for chemical analysis of tantalum and niobium - Part 13: Determination of nitrogen content - Inert gas fusion thermal conductivity method
1 Scope
This part of GB/T 15076 specifies a method for the determination of nitrogen content in tantalum and niobium.
This part is applicable to the determination of nitrogen content in tantalum and niobium. Determination range: 0.0005%–0.400%.
2 Principle
The test portion and flux are added to the high-purity graphite crucible, heated and fused in the atmosphere of inert gas (helium), in which oxygen combines with the carbon in the crucible to generate a mixture of carbon monoxide and carbon dioxide, with nitrogen released in the form of nitrogen gas. Carbon monoxide is partially oxidized into carbon dioxide. Then carbon monoxide and carbon dioxide in the gas pipeline are absorbed and separated respectively, and the remaining nitrogen gas enters the thermal conductivity detector with the carrier gas (helium). The detector outputs a signal, and the calculation system calculates the nitrogen content with the mass of the sample.
3 Materials
3.1 Helium, with a volume fraction of not less than 99.995%.
3.2 Argon gas/ nitrogen gas, with a volume fraction of not less than 99.9%.
3.3 High-purity nickel foil/nickel basket: ωN ≤ 0.000 2%, nickel foil thickness ≤ 0.10 mm.
3.4 High-purity graphite crucible.
3.5 Reference material/standard sample: Appropriate reference materials, which, in principle, shall have similar chemical composition to that of the analytical sample.
Foreword i
1 Scope
2 Principle
3 Materials
4 Instruments and apparatus
5 Specimen
6 Analytical procedures
7 Precision
8 Test report
Standard
GB/T 15076.13-2017 Methods for chemical analysis of tantalum and niobium—Part 13:Determination of nitrogen content—Inert gas fusion thermal conductivity method (English Version)
Standard No.
GB/T 15076.13-2017
Status
valid
Language
English
File Format
PDF
Word Count
3500 words
Price(USD)
70.0
Implemented on
2018-8-1
Delivery
via email in 1 business day
Detail of GB/T 15076.13-2017
Standard No.
GB/T 15076.13-2017
English Name
Methods for chemical analysis of tantalum and niobium—Part 13:Determination of nitrogen content—Inert gas fusion thermal conductivity method
GB/T 15076.13-2017 Methods for chemical analysis of tantalum and niobium - Part 13: Determination of nitrogen content - Inert gas fusion thermal conductivity method
1 Scope
This part of GB/T 15076 specifies a method for the determination of nitrogen content in tantalum and niobium.
This part is applicable to the determination of nitrogen content in tantalum and niobium. Determination range: 0.0005%–0.400%.
2 Principle
The test portion and flux are added to the high-purity graphite crucible, heated and fused in the atmosphere of inert gas (helium), in which oxygen combines with the carbon in the crucible to generate a mixture of carbon monoxide and carbon dioxide, with nitrogen released in the form of nitrogen gas. Carbon monoxide is partially oxidized into carbon dioxide. Then carbon monoxide and carbon dioxide in the gas pipeline are absorbed and separated respectively, and the remaining nitrogen gas enters the thermal conductivity detector with the carrier gas (helium). The detector outputs a signal, and the calculation system calculates the nitrogen content with the mass of the sample.
3 Materials
3.1 Helium, with a volume fraction of not less than 99.995%.
3.2 Argon gas/ nitrogen gas, with a volume fraction of not less than 99.9%.
3.3 High-purity nickel foil/nickel basket: ωN ≤ 0.000 2%, nickel foil thickness ≤ 0.10 mm.
3.4 High-purity graphite crucible.
3.5 Reference material/standard sample: Appropriate reference materials, which, in principle, shall have similar chemical composition to that of the analytical sample.
Contents of GB/T 15076.13-2017
Foreword i
1 Scope
2 Principle
3 Materials
4 Instruments and apparatus
5 Specimen
6 Analytical procedures
7 Precision
8 Test report
