GB/T 4324.8-2008Methods for chemical analysis of tungsten - Determination of nickel content - The inductively coupled plasma atomic emission spectrometry , flame atomic absorption spectrometry and dimethylglyoxime gravimetry (English PDF)
钨化学分析方法 镍量的测定 电感耦合等离子体原子发射光谱法、火焰原子吸收光谱法和丁二酮肟重量法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
June 9, 2008
Implementation date
December 1, 2008
Scope
GB/T 4324.8-2008 is the English-translated version of 钨化学分析方法 镍量的测定 电感耦合等离子体原子发射光谱法、火焰原子吸收光谱法和丁二酮肟重量法.
GB/T 4324.8-2008 is the Chinese standard "Methods for chemical analysis of tungsten - Determination of nickel content - The inductively coupled plasma atomic emission spectrometry , flame atomic absorption spectrometry and dimethylglyoxime gravimetry".
Its scope clause reads: This method specifies tungsten powder, tungsten determination, tungsten carbide, tungsten trioxide, tungstic acid, tungsten blue, purple tungsten, ammonium paratungstate and ammonium metatungstate in nickel content method.
This method is suitable for tungsten powder, tungsten, tungsten carbide, tungsten, tungsten acid, tungsten blue, purple tungsten, paratungstate and tungsten trioxide partial determination of ammonium nickel content.
Measurement range. 0.0004% to 0.050%. Its clauses include method summary; reagents; instruments and equipment; sample.
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Document preview — GB/T 4324.8-2008
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 63
- Replacing
- GB/T 4324.8-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method summary
- 3 Reagents
- 4 instruments and equipment
- 5 Sample
1 Scope
This method specifies tungsten powder, tungsten determination, tungsten carbide, tungsten trioxide, tungstic acid, tungsten blue, purple tungsten, ammonium paratungstate and ammonium metatungstate in nickel content method.
This method is suitable for tungsten powder, tungsten, tungsten carbide, tungsten, tungsten acid, tungsten blue, purple tungsten, paratungstate and tungsten trioxide partial determination of ammonium nickel content.
Measurement range. 0.0004% to 0.050%.
2 Method summary
Tungsten powder, tungsten bar, fine (in) tungsten carbide particles with hydrogen peroxide dissolved; tungsten trioxide, tungstic acid, ammonium paratungstate and ammonium metatungstate dissolved with ammonia;
Blue tungsten dissolved ammonia and hydrogen peroxide; purple tungsten, tungsten carbide coarse particles burning into three after the tungsten oxide dissolved in ammonia. Hydrochloric acid to dissolve nickel peroxide
Hydrogen peroxide, citric acid complex of tungsten, nickel content was measured in the spectrometer inductively coupled plasma atomic emission.
3 Reagents
Unless otherwise indicated, used in the analysis confirmed only for the gifted class pure reagents and double distilled water.
3.1
Hydrogen peroxide (rho1.10g/mL).
Ammonia 3.2 (1 + 1).
3.3
citric acid solution (500g/L).
3.4
HCl (1 + 1).
3.5 Nickel standard stock solution
Weigh 0.1000g of nickel (Ni>=99.99%) in 250mL beaker with a small amount of water wet, add
20mL of nitric acid (1 + 1), covered with a watch glass, low heat until completely dissolved, cooled to room temperature, the solution is transferred 1000mL volumetric flask
Dilute with water to volume, and mix. This solution 1mL containing 100µg nickel.
3.6 Nickel standard solution
Pipette 10.00mL Nickel standard stock solution (3.5) placed in 100mL flask, add 2mL nitric acid (1 + 1), diluted with water to volume, and mix. This solution 1mL containing 10µg nickel.
3.7 tungsten base
nickel content is less than 0.0001%.
4 instruments and equipment
Inductively coupled plasma atomic emission spectrometer.
5 Sample
5.1
tungsten and shall crush through 125µm sieve.
5.2
average particle size of the tungsten carbide fine particles 1µm ~ 3µm, the average particle size of the tungsten carbide particles is greater than 3µm ~ 9µm, coarse WC particles
The average particle size greater than 9µm.
Step 6 Analysis
6.1 Sample
Weigh 0.5g ~ 1g sample (5), accurate to 0.0001g.
......
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 4324.8
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4324.8-2008 | Methods for chemical analysis of tungsten - Determination of nickel content - The inductively coupled plasma atomic emission spectrometry , flame atomic absorption spectrometry and dimethylglyoxime gravimetry | current edition | Current |
| GB/T 4324.8-1984 | Methods for chemical analysis of tungsten - Determination of nickel content - The inductively coupled plasma atomic emission spectrometry , flame atomic absorption spectrometry and dimethylglyoxime gravimetry | previous edition | Superseded |
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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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