GB/T 4324.21-2012Methods for chemical analysis of tungsten - Part 21: Determination of chromium content - Inductively coupled plasma atomic emission spectrometry (English PDF)
钨化学分析方法 第21部分：铬量的测定 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
December 31, 2012
Implementation date
October 1, 2013
Scope
GB/T 4324.21-2012 is the English-translated version of 钨化学分析方法 第21部分：铬量的测定 电感耦合等离子体原子发射光谱法.
GB/T 4324.21-2012 is the Chinese standard "Methods for chemical analysis of tungsten - Part 21: Determination of chromium content - Inductively coupled plasma atomic emission spectrometry".
Its scope clause reads: This section GB/T 4324 provisions of the tungsten powder, tungsten trioxide, tungsten, tungsten acid, ammonium metatungstate, ammonium paratungstate, tungsten blue, purple tungsten and tungsten carbide Determination of chromium content.
This Part applies to tungsten powder, tungsten, tungsten, tungsten acid, ammonium metatungstate, ammonium paratungstate, tungsten blue, purple tungsten carbide and chromium content was measured trioxide.
Determination range of 0.0002% to 0.02%. Its clauses include principle of the method; reagents and materials; instrument.
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Document preview — GB/T 4324.21-2012
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 63
- Replacing
- GB/T 4324.21-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 principle of the method
- 3 Reagents and materials
- 4 Instrument
1 Scope
This section GB/T 4324 provisions of the tungsten powder, tungsten trioxide, tungsten, tungsten acid, ammonium metatungstate, ammonium paratungstate, tungsten blue, purple tungsten and tungsten carbide
Determination of chromium content.
This Part applies to tungsten powder, tungsten, tungsten, tungsten acid, ammonium metatungstate, ammonium paratungstate, tungsten blue, purple tungsten carbide and chromium content was measured trioxide.
Determination range of 0.0002% to 0.02%.
2 principle of the method
Sample with hydrogen peroxide, ammonia dissolved in hydrochloric acid precipitation separation matrix. Inductively coupled plasma atomic emission spectroscopy to recommend
Analysis line wavelength measuring the emission intensity of the test solution of chromium, chromium concentration obtained from the working curve method, the mass fraction expressed determination result.
3 Reagents and materials
Unless otherwise indicated, used in the analysis confirmed only for the gifted class pure reagents and distilled or deionized water or equivalent purity.
3.1
Hydrogen peroxide (rho = 1.10g/mL).
3.2
hydrochloric acid (rho = 1.19g/mL).
3.3
Ammonia (11), with the MOS level ammonia preparation.
3.4
hydrochloric acid (119).
3.5
hydrochloric acid (149).
3.6 Chromium standard stock solution
Weigh 0.1000g chromium (mass fraction greater than 99.99%), placed in 100mL beaker, add
25mL hydrochloric acid (3.2), cooled to room temperature after heating was dissolved and transferred to 100mL volumetric flask, dilute with water to volume, and mix. This solution
1mL containing 1.00mg chromium.
3.7
Chromium Standard Solution A. Pipette 10.00mL chromium standard stock solution (3.6) placed in 100mL flask, add 5mL hydrochloric acid (3.2), diluted with water to volume, and mix. This solution 1mL containing 100µg chromium.
3.8 Chromium standard solution B
Pipette 10.00mL chromium standard solution (3.7) were placed in 100mL volumetric flask, was added 5mL hydrochloric acid (3.2) to
Dilute with water to volume, and mix. This solution 1mL containing 10µg chromium.
3.9 Argon
volume fraction of not less than 99.99%
4 Instrument
4.1
Inductively coupled plasma spectrometer with a resolution of < 0.006nm (200nm office).
4.2
Recommended chromium analytical line wavelength 357.868nm.
4.3
chromium detection limit of 0.014µg/mL, measured limit of 0.070µg/mL.
......
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 4324.21
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4324.21-2012 | Methods for chemical analysis of tungsten - Part 21: Determination of chromium content - Inductively coupled plasma atomic emission spectrometry | current edition | Current |
| GB/T 4324.21-1984 | Methods for chemical analysis of tungsten - Part 21: Determination of chromium content - Inductively coupled plasma atomic emission spectrometry | previous edition | Superseded |
This page sells the current edition, GB/T 4324.21-2012. Earlier editions are listed for reference only.
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Related Standards
GB/T 4324.1-2012 — Methods for chemical analysis of tungsten - Part 1: Determination of lead content - Flame atomic absorption spectrometry
GB/T 4324.10-2012 — Methods for chemical analysis of tungsten - Part 10: Determination of copper content - Flame atomic absorption spectrometry
GB/T 4324.11-2012 — Methods for chemical analysis of tungsten - Part 11: Determination of aluminum content - Inductively coupled plasma atomic emission spectrometry
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