GB/T 7731.6-2008Ferrotungsten - Determination of arsenic content - The molybdenum blue photometrie method and inductively coupled plasma-atomic emission spectrometry (English PDF)
钨铁 砷含量的测定 钼蓝光度法和电感耦合等离子体原子发射光谱法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 19, 2008
Implementation date
April 1, 2009
Scope
GB/T 7731.6-2008 is the English-translated version of 钨铁 砷含量的测定 钼蓝光度法和电感耦合等离子体原子发射光谱法.
GB/T 7731.6-2008 is the Chinese standard "Ferrotungsten - Determination of arsenic content - The molybdenum blue photometrie method and inductively coupled plasma-atomic emission spectrometry".
Its scope clause reads: GB/T 7731 provisions of this part of the iron determination of tungsten molybdenum blue photometric method and inductively coupled plasma atomic emission spectrometry Arsenic content.
This section applies to the determination of tungsten iron arsenic content. Molybdenum blue spectrophotometric measurement range (mass fraction). 0.010% to 0.10%; inductively coupled Plasma atomic emission spectrometry range (mass fraction). 0.010% to 0.20%. Its clauses include method one.
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Document preview — GB/T 7731.6-2008
National Standard of the People's Republic of China
- ICS
- 77.100
- Classification
- H 11
- Replacing
- GB/T 7731.6-1987
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Method One
- 3.1 Principle
- 3.2 Reagents and materials
1 Scope
GB/T 7731 provisions of this part of the iron determination of tungsten molybdenum blue photometric method and inductively coupled plasma atomic emission spectrometry
Arsenic content.
This section applies to the determination of tungsten iron arsenic content. Molybdenum blue spectrophotometric measurement range (mass fraction). 0.010% to 0.10%; inductively coupled
Plasma atomic emission spectrometry range (mass fraction). 0.010% to 0.20%.
2 Normative references
The following documents contain provisions which, through reference to GB/T 7731 to the present, constitute provisions of this section. Every note has a reference date
Documents, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Research into whether the parties to the agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
GB/T 4010 alloy chemical analysis and preparation of samples
3 Method One
molybdenum blue photometric
3.1 Principle
Sample with sodium peroxide, sodium carbonate melt, after leaching in sulfuric acid solution containing tartaric acid in hydrogen sulfide arsenic and copper, tin and other co-precipitation
Isolated, dissolved in nitric acid, sulfuric acid, oxidation with sodium hydroxide. Sulfuric acid solution to adjust the pH, add ammonium molybdate and hydrazine sulfate reaction of molybdenum
Blue, measuring absorbance at 810nm wavelength.
3.2 Reagents and materials
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled water or its equivalent purity water.
3.2.1
sodium peroxide, solid.
3.2.2
sodium carbonate, a solid (dry).
3.2.3
tartaric, solid.
3.2.4
nitrate, rho1.42g/mL.
3.2.5
sulfate, rho1.84g/mL.
3.2.6
ammonium hydroxide, rho0.90g/mL.
3.2.7
nitric acid, 1 + 1.
3.2.8
sulfuric acid, 1 + 1.
3.2.9
sulfate, 1 + 10.
3.2.10
ammonium hydroxide, 1 + 1.
3.2.11
hydrogen sulfide, ferrous sulfide and dilute hydrochloric acid occurs Kipp generator reaction.
3.2.12
sodium hydroxide solution, 150g/L.
3.2.13
potassium permanganate solution, 5g/L.
3.2.14
ammonium molybdate solution, 10g/L, weighed 1g paramolybdate dissolved and diluted with water to 100mL.
......
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
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Editions of GB/T 7731.6
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 7731.6-2008 | Ferrotungsten - Determination of arsenic content - The molybdenum blue photometrie method and inductively coupled plasma-atomic emission spectrometry | current edition | Current |
| GB/T 7731.6-1987 | Ferrotungsten - Determination of arsenic content - The molybdenum blue photometrie method and inductively coupled plasma-atomic emission spectrometry | previous edition | Superseded |
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Related Standards
GB/T 7731.7-2008 — Ferrotungsten - Determination of tin content - Phenylfluorone photometric method and inductively coupled plasma-atomic emission spectrometry
GB/T 7731.5-1987 — Methods for chemical analysis of ferrotungsten. The molybdenum blue photometric method for the determination of silicon content
GB/T 7731.7-1987 — Methods for chemical analysis of ferrotungsten--The phenylfluorone photometric method for the determination of tin content
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