GB/T 7731.14-2008Ferrotungsten - Determination of lead content - The polarographic method and inductively coupled plasma-atomic emission spectrometry (English PDF)
钨铁 铅含量的测定 极谱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
May 13, 2008
Implementation date
November 1, 2008
Scope
GB/T 7731.14-2008 is the English-translated version of 钨铁 铅含量的测定 极谱法和电感耦合等离子体原子发射光谱法.
GB/T 7731.14-2008 is the Chinese standard "Ferrotungsten - Determination of lead content - The polarographic method and inductively coupled plasma-atomic emission spectrometry".
Its scope clause reads: This section specifies the determination of the amount of lead iron tungstate spectrometry by polarography and inductively coupled plasma atomic emission.
This section applies to the determination of tungsten iron lead content. Measurement range (mass fraction). 0.001% to 0.12%.
Where applicable polarography Determination of the mass fraction of 0.001% to 0.05% lead content; inductively coupled plasma atomic emission spectrometry applied to the mass fraction Determination of 0.010% to 0.12% lead content. Its clauses include method one.
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Document preview — GB/T 7731.14-2008
National Standard of the People's Republic of China
- ICS
- 77.100
- Classification
- H 11
- Replacing
- GB 7731.14-1988
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
This section specifies the determination of the amount of lead iron tungstate spectrometry by polarography and inductively coupled plasma atomic emission.
This section applies to the determination of tungsten iron lead content. Measurement range (mass fraction). 0.001% to 0.12%. Where applicable polarography
Determination of the mass fraction of 0.001% to 0.05% lead content; inductively coupled plasma atomic emission spectrometry applied to the mass fraction
Determination of 0.010% to 0.12% lead content.
2 Normative references
The following documents contain provisions which, through reference in this section constitute provisions of this section. For dated references, subsequent
All amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to reach an agreement under this section
Research on whether 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
Polarographic
3.1 Principle
Sample with nitric acid - hydrofluoric acid dissolved perchlorate smoke, adding tartaric acid, pH adjusted with sodium hydroxide and dissolved tungstate. In pH7.5 ~
PH8.0 case, the copper nitrate as the carrier, with thioacetamide precipitation lead to interference separation of elements, and then to iron as the carrier, separated with ammonia copper. In perchloric acid and phosphoric bottom liquid nitrogen to oxygen, at the peak potential is -0.51V was measured POLAROGRAPHY.
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
hydrofluoric acid, rho1.15g/mL.
3.2.2
nitrate, rho1.42g/mL.
3.2.3
perchloric acid, rho1.67g/mL.
3.2.4
hydrochloric acid, 1 + 1.
3.2.5
hydrochloric acid, 1 + 2.
3.2.6
hydrochloric acid - nitric acid mixture, 3 + 1.
3.2.7
phosphoric acid solution, 1mol/L.
3.2.8
ammonia, rho0.90g/mL.
3.2.9
ammonia, 1 + 2.
3.2.10
ammonia, 1 + 100.
3.2.11
ammonia, 1 + 200.
3.2.12
sodium hydroxide solution, 250g/L, stored in plastic bottles.
3.2.13
copper nitrate solution, 10g/L.
3.2.14
ferric nitrate solution, 1g/L, Weigh 1g of ferric nitrate dissolved in 50mL water, adding 5mL nitric acid, transferred to 1000mL capacity
Bottle, diluted with water to volume, 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
Cited by
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Editions of GB/T 7731.14
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 7731.14-2008 | Ferrotungsten - Determination of lead content - The polarographic method and inductively coupled plasma-atomic emission spectrometry | current edition | Current |
| GB 7731.14-1988 | Ferrotungsten - Determination of lead content - The polarographic method and inductively coupled plasma-atomic emission spectrometry | previous edition | Superseded |
This page sells the current edition, GB/T 7731.14-2008. Earlier editions are listed for reference only.
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Related Standards
GB/T 7731.15-1999 — Methods for chemical analysis of ferrotungsten-The flame atomic absorption spectrometric method for the determination of copper content
GB/T 7731.12-1988 — Methods for chemical analysis of ferrotungsten--The infrared absorption method for the determination of sulfur content
GB/T 7731.16-1999 — Methods for chemical analysis of ferrotungsten-The flame atomic absorption spectrometric method for the determination of manganese content
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