GB/T 4324.25-2012Methods for chemical analysis of tungsten - Part 25: Determination of oxygen content - Pulse heating inert gas fusion-infrared absorption method (English PDF)
钨化学分析方法 第25部分：氧量的测定 脉冲加热惰气熔融-红外吸收法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 31, 2012
Implementation date
October 1, 2013
Scope
GB/T 4324.25-2012 is the English-translated version of 钨化学分析方法 第25部分：氧量的测定 脉冲加热惰气熔融-红外吸收法.
GB/T 4324.25-2012 is the Chinese standard "Methods for chemical analysis of tungsten - Part 25: Determination of oxygen content - Pulse heating inert gas fusion-infrared absorption method".
Its scope clause reads: GB/T 4324 provisions of this part of the determination of tungsten products and the amount of oxygen. This section applies to tungsten and its products - Determination of the amount of oxygen.
Determination range of 0.0005% to 1.00%. Its clauses include method summary; materials and reagents; instrument; sample.
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Document preview — GB/T 4324.25-2012
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 63
- Replacing
- GB/T 4324.25-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method summary
- 3 Materials and Reagents
- 4 Instrument
- 5 Sample
1 Scope
GB/T 4324 provisions of this part of the determination of tungsten products and the amount of oxygen.
This section applies to tungsten and its products - Determination of the amount of oxygen. Determination range of 0.0005% to 1.00%.
2 Method summary
Degassed sample is placed in high temperature graphite crucible and heated and melted in the purification of argon/helium stream sample release oxygen to the graphite crucible
The binding of carbon monoxide is formed (or heated rare-earth copper oxide to convert carbon monoxide to carbon dioxide), the carrier gas loaded infrared detector
The pool was measured oxygen.
3 Materials and Reagents
3.1 Argon
purity of more than 99.95%.
3.2 Helium
purity of greater than 99.995%.
3.3 high-purity nickel foil or a nickel bag
the oxygen content is less than 0.0010%.
3.4 rare earth copper oxide
loose particles (0.75 ~ 0.5) mm.
3.5
alkali asbestos or efficient carbon dioxide absorbents (0.75 ~ 0.5) mm.
3.6
anhydrous magnesium perchlorate or efficient water-absorbing agent (1.5 ~ 0.75) mm.
3.7
high-purity graphite crucible.
3.8 Standard substance
metal oxygen CRMs.
4 Instrument
Pulse heating - infrared instrument for oxygen. Instrument sensitivity is not less than 0.01µg/g.
5 Sample
5.1
powder sample pre-treatment and wrapped tightly in foil weighed nickel or nickel bag (3.3), then the total amount of the sample was weighed and a nickel foil or a nickel bag, subtraction
Get quality sample. Sample analysis should days.
5.2
bulk sample removed epidermis, clean carbide mortar hammer broke into a diameter of about 2mm ~ 5mm, the quality of 0.5g ~ 1.0g
About particles weighing. Day sample analysis should be treated.
5.3
The specimen shall be placed in the dryer to save.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Cited by
- GB/T 26725-2023Ultrafine tungsten carbide powder
- GB/T 26055-2022Reproduced tungsten carbide powder
- GB/T 2967-2017Cast tungsten carbide powder
- YS/T 1025-2015High-purity tungsten and tungsten alloy sputtering target used in electronic film
- YS/T 412-2014Cemented carbide pellets
- JB/T 5336-2008Tungsten powder for copper-tungsten contact materials - Technical requirements
Similar standards
Editions of GB/T 4324.25
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4324.25-2012 | Methods for chemical analysis of tungsten - Part 25: Determination of oxygen content - Pulse heating inert gas fusion-infrared absorption method | current edition | Current |
| GB/T 4324.25-1984 | Methods for chemical analysis of tungsten - Part 25: Determination of oxygen content - Pulse heating inert gas fusion-infrared absorption method | previous edition | Superseded |
This page sells the current edition, GB/T 4324.25-2012. Earlier editions are listed for reference only.
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Related Standards
GB/T 4324.1-2012 — Methods for chemical analysis of tungsten - Part 1: Determination of lead content - Flame atomic absorption spectrometry
GB/T 4324.10-2012 — Methods for chemical analysis of tungsten - Part 10: Determination of copper content - Flame atomic absorption spectrometry
GB/T 4324.11-2012 — Methods for chemical analysis of tungsten - Part 11: Determination of aluminum content - Inductively coupled plasma atomic emission spectrometry
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