GB/T 4699.6-2008Ferrochromium and silicochromium - Determination of sulfur content - The infrared absorption method and the combustion-titration method (English PDF)
铬铁和硅铬合金 硫含量的测定 红外线吸收法和燃烧中和滴定法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 13, 2008
Implementation date
November 1, 2008
Scope
GB/T 4699.6-2008 is the English-translated version of 铬铁和硅铬合金 硫含量的测定 红外线吸收法和燃烧中和滴定法.
GB/T 4699.6-2008 is the Chinese standard "Ferrochromium and silicochromium - Determination of sulfur content - The infrared absorption method and the combustion-titration method".
Its scope clause reads: This part specifies the determination of sulfur content of ferrochromium and silicochromium by infrared absorption method and combustion-titration method.
This part is applicable to the determination of sulfur content of ferrochromium and silicochromium. The determination range (mass fraction) of infrared absorption method and combustion-titration method is 0.0050% ~ 0.070% and 0.0050% ~ 0.120% respectively. Its clauses include method i — infrared absorption method.
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Document preview — GB/T 4699.6-2008
National Standard of the People's Republic of China
- ICS
- 77.100
- Classification
- H 11
- Replacing
- GB/T 4699.7-1988
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword i
- 1 Scope
- 2 Normative references
- 3 Method I — Infrared absorption method
- 4 Method II — Combustion-titration method
- 5 Test report
1 Scope
This part specifies the determination of sulfur content of ferrochromium and silicochromium by infrared absorption method and combustion-titration method.
This part is applicable to the determination of sulfur content of ferrochromium and silicochromium. The determination range (mass fraction) of infrared absorption method and combustion-titration method is 0.0050% ~ 0.070% and 0.0050% ~ 0.120% respectively.
2 Normative references
The following normative documents contain provisions which, through reference in this part, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this part. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
GB/T 4010 Ferroalloys sampling and preparation of samples for chemical analysis
3 Method I — Infrared absorption method
3.1 Principle
The test portion is heated and burned in oxygen flow in the high-frequency induction furnace. The generated sulfur dioxide is carried by oxygen to the measuring chamber of an infrared analyzer. Sulfur dioxide absorbs infrared energy at a specific wavelength, and its absorption energy is proportional to its concentration. The sulfur content can be measured based on changes in the energy received by the detector.
3.2 Reagents and materials
3.2.1 Magnesium perchlorate
anhydrous, granular.
3.2.2 Soda asbestos
granular.
3.2.3
Glass wool.
3.2.4 Tungsten particles
sulfur content less than 0.0002%, particle size 0.8 mm ~ 1.4 mm.
3.2.5 Tin particles
carbon content less than 0.0003%, particle size 0.4 mm ~ 0.8 mm.
3.2.6 Pure iron
purity greater than 99.8%, sulfur content less than 0.002%, particle size 0.8 mm ~ 1.68 mm.
3.2.7 Oxygen
purity greater than 99.95%. Other grades of oxygen may also be used if low and consistent blank values can be achieved.
......
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
Similar standards
Editions of GB/T 4699.6
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4699.6-2008 | Ferrochromium and silicochromium - Determination of sulfur content - The infrared absorption method and the combustion-titration method | current edition | Current |
| GB/T 4699.7-1988 | Ferrochromium and silicochromium - Determination of sulfur content - The infrared absorption method and the combustion-titration method | previous edition | Superseded |
This page sells the current edition, GB/T 4699.6-2008. Earlier editions are listed for reference only.
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