GB/T 7731.9-2008Ferrotungsten - Determination of bismuth content - The bismuth iodide photometric method and inductively coupled plasma - atomic emission spectrometry (English PDF)
钨铁 铋含量的测定 碘化铋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 7731.9-2008 is the English-translated version of 钨铁 铋含量的测定 碘化铋光度法和电感耦合等离子体原子发射光谱法.
GB/T 7731.9-2008 is the Chinese standard "Ferrotungsten - Determination of bismuth content - The bismuth iodide photometric method and inductively coupled plasma - atomic emission spectrometry".
Its scope clause reads: GB/T 7731 This section specifies the spectrophotometric determination of tungsten and iron by inductively coupled plasma atomic emission spectrometry with bismuth iodide Bismuth content.
This section applies to the determination of tungsten in the iron content of bismuth. Bismuth iodide spectrophotometric measurement range (mass fraction). 0.010% - 0.060%; electricity Inductively coupled plasma atomic emission spectrometry range (mass fraction). 0.010% to 0.15%. Its clauses include method one.
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Document preview — GB/T 7731.9-2008
National Standard of the People's Republic of China
- ICS
- 77.100
- Classification
- H 11
- Replacing
- GB/T 7731.9-1987
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 This section specifies the spectrophotometric determination of tungsten and iron by inductively coupled plasma atomic emission spectrometry with bismuth iodide
Bismuth content.
This section applies to the determination of tungsten in the iron content of bismuth. Bismuth iodide spectrophotometric measurement range (mass fraction). 0.010% - 0.060%; electricity
Inductively coupled plasma atomic emission spectrometry range (mass fraction). 0.010% to 0.15%.
2 Normative references
The following documents contain provisions which, through reference to GB/T 7731 to the present, constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research 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
bismuth iodide photometric method
3.1 Principle
Sample with nitric acid, hydrofluoric acid decomposition, white smoke treated with sulfuric acid, tartaric acid in sulfuric acid solution containing the hydrogen sulfide, so that bismuth and copper, tin
And other co-precipitation, then potassium sulfide treatment, the bismuth and copper, tin and other separation. Burning oxide, nitric acid is dissolved in the presence of ammonium ferric sulfate, hydrogen
The co-precipitation of ammonium bismuth oxide is separated, dissolved in sulfuric acid, potassium iodide and sodium hypophosphite make bismuth hair color, measured at 450nm wavelength
Absorbance. Low amount of bismuth to isoamyl alcohol extraction, the organic phase was measured absorbance at 450nm 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
tartaric, solid.
3.2.2
hydrofluoric acid, rho1.12g/mL.
3.2.3
nitric acid, 1 + 1.
3.2.4
sulfate, 1 + 1.
3.2.5
sulfate, 100 + 1.
3.2.6
Ammonium hydroxide, 1 + 1.
3.2.7
copper sulfate (CuSO4 · 5H2O) solution, 2g/L.
3.2.8
hydrogen sulfide, ferrous sulfide and dilute hydrochloric acid occurs Kipp generator reaction.
3.2.9
sodium hypophosphite solution, 250g/L.
3.2.10
potassium iodide solution, 100g/L.
High-speed rail 3.2.11 ammonium sulfate solution, 10g/L. Weigh 1g ammonium ferric sulfate [Fe2 (SO4) 3 (NH4) 2SO4 · 24H2O], dissolved in water,
Diluted 100mL, and mix.
......
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
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Editions of GB/T 7731.9
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 7731.9-2008 | Ferrotungsten - Determination of bismuth content - The bismuth iodide photometric method and inductively coupled plasma - atomic emission spectrometry | current edition | Current |
| GB/T 7731.9-1987 | Ferrotungsten - Determination of bismuth content - The bismuth iodide photometric method and inductively coupled plasma - atomic emission spectrometry | previous edition | Superseded |
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Related Standards
GB/T 7731.10-2021 — Ferrotungsten—Determination of carbon content—Infrared absorption method
GB/T 7731.8-1987 — Methods for chemical analysis of ferrotungsten--The tetraethylrhodamine photometric method for the determination of antiory content
GB/T 7731.10-1988 — Methods for chemical analysis of ferrotungsten. The infrared absorption method for the determination of carbon content
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