GB/T 4325.23-2013Methods for chemical analysis of molybdenum - Part 23: Determination of oxygen and nitrogen contents - Inert gas fusion-infrared absorption and thermal conductivity method (English PDF)
钼化学分析方法 第23部分：氧量和氮量的测定 惰气熔融红外吸收法-热导法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 9, 2013
Implementation date
February 1, 2014
Scope
GB/T 4325.23-2013 is the English-translated version of 钼化学分析方法 第23部分：氧量和氮量的测定 惰气熔融红外吸收法-热导法.
GB/T 4325.23-2013 is the Chinese standard "Methods for chemical analysis of molybdenum - Part 23: Determination of oxygen and nitrogen contents - Inert gas fusion-infrared absorption and thermal conductivity method".
Its scope clause reads: GB/T 4325 provisions of this part of the inert gas fusion infrared absorption method - thermal conductivity method for simultaneous determination of molybdenum in the amount of oxygen and nitrogen.
This section applies to the determination of molybdenum in the oxygen and nitrogen content. Measurement range. 0.0005% to 1.00% oxygen; nitrogen 0.0005% to 0.020%. Its clauses include method summary; reagents and materials; instrument; sample.
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Document preview — GB/T 4325.23-2013
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 63
- Replacing
- GB/T 4325.26-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method summary
- 3 Reagents and materials
- 4 Instrument
- 5 Sample
1 Scope
GB/T 4325 provisions of this part of the inert gas fusion infrared absorption method - thermal conductivity method for simultaneous determination of molybdenum in the amount of oxygen and nitrogen.
This section applies to the determination of molybdenum in the oxygen and nitrogen content. Measurement range. 0.0005% to 1.00% oxygen; nitrogen 0.0005% to 0.020%.
2 Method summary
A sample with a flux added graphite crucible, heated and melted in an inert gas (helium) is protected, and wherein the oxygen to form carbon crucible
CO, nitrogen is released in the form of N2. CO is partially oxidized to CO2, CO2 and CO along with the rest of the carrier gas flow entering an infrared detector, the detector
The output signal of the computing system based on the oxygen content of the sample mass calculation, the results are displayed in percentage. Gas path of CO, CO2 is absorbed respectively
Isolated, with the remaining nitrogen carrier gas (helium) into the thermal conductivity detector, the detector output signal computing system calculates the nitrogen content of the sample based on quality, knot
Results are shown in percentages.
3 Reagents and materials
3.1
acetone.
3.2 graphite crucible
pure spectrum.
3.3
Nickel bag (thickness <=0.05mm, wO<=0.001%, wN<=0.00008%).
3.4
Nickel basket (wO<=0.0005%, wN<=0.00005%).
3.5
magnesium perchlorate.
3.6
alkali asbestos.
3.7
rare earth copper oxide.
3.8
copper wire.
Helium 3.9, the volume fraction of not less than 99.99%.
3.10 Standards/Standard sample
Material should be similar to the unknown sample and the oxygen/nitrogen content of the unknown sample is slightly higher than the oxygen/nitrogen content.
4 Instrument
4.1
inert gas fusion - infrared - thermal conductivity detection system comprises an electrode furnace, purification and analysis of a carrier gas stream conversion systems, carbon monoxide red
External carbon dioxide detector and infrared detector nitrogen thermal conductivity detector, computer and software control systems.
4.2
helium tank and regulator.
4.3 Balance
dividing the value of 0.1mg.
4.4
crucible tongs.
5 Sample
5.1
bulk sample on the grinding machine grinding its surface processed into a particle mass 0.05g ~ 0.08g, dried acetone, after removing the cold […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 4325.23
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4325.23-2013 | Methods for chemical analysis of molybdenum - Part 23: Determination of oxygen and nitrogen contents - Inert gas fusion-infrared absorption and thermal conductivity method | current edition | Current |
| GB/T 4325.26-1984 | Methods for chemical analysis of molybdenum - Part 23: Determination of oxygen and nitrogen contents - Inert gas fusion-infrared absorption and thermal conductivity method | previous edition | Superseded |
This page sells the current edition, GB/T 4325.23-2013. Earlier editions are listed for reference only.
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Related Standards
GB/T 4325.24-2013 — Methods for chemical analysis of molybdenum - Part 24: Determination of tungsten content - Inductively coupled plasma atomic emission spectrometry
GB/T 4325.22-1984 — Methods for chemical analysis of molybdenum--The formaldoxime photometric method for the determination of manganese content
GB/T 4325.24-1984 — Methods for chemical analysis of molybdenum--The molybdenum blue photometric method for the determination of phosphorus content
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