GB/T 4324.7-2012Methods for chemical analysis of tungsten - Part 7: Determination of cobalt content - Inductively coupled plasma atomic emission spectrometry (English PDF)
钨化学分析方法 第7部分：钴量的测定 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 4324.7-2012 is the English-translated version of 钨化学分析方法 第7部分：钴量的测定 电感耦合等离子体原子发射光谱法.
GB/T 4324.7-2012 is the Chinese standard "Methods for chemical analysis of tungsten - Part 7: Determination of cobalt content - Inductively coupled plasma atomic emission spectrometry".
Its scope clause reads: GB/T 4324 provisions of this part of the tungsten powder, tungsten trioxide, tungsten, tungsten blue, purple tungsten, tungsten carbide, tungsten acid, ammonium metatungstate, ammonium paratungstate Determination of cobalt content.
This Part applies to tungsten powder, tungsten trioxide, tungsten, tungsten blue, purple tungsten, tungsten carbide, tungsten acid, ammonium metatungstate, ammonium paratungstate cobalt contents.
Determination range of 0.0001% to 0.050%. Its clauses include method summary; reagents; instrument; sample.
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Document preview — GB/T 4324.7-2012
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 63
- Replacing
- GB/T 4324.7-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method summary
- 3 Reagents
- 4 Instrument
- 5 Sample
1 Scope
GB/T 4324 provisions of this part of the tungsten powder, tungsten trioxide, tungsten, tungsten blue, purple tungsten, tungsten carbide, tungsten acid, ammonium metatungstate, ammonium paratungstate
Determination of cobalt content.
This Part applies to tungsten powder, tungsten trioxide, tungsten, tungsten blue, purple tungsten, tungsten carbide, tungsten acid, ammonium metatungstate, ammonium paratungstate cobalt contents.
Determination range of 0.0001% to 0.050%.
2 Method summary
Tungsten powder, tungsten, tungsten blue, fine tungsten carbide, tungsten trioxide, tungstic acid, ammonium metatungstate, ammonium paratungstate with hydrogen peroxide and ammonia decomposition; purple tungsten, crude
Burning particulate tungsten carbide into tungsten trioxide and hydrogen peroxide, and ammonia decomposition. After the main tungsten hydrochloride precipitate was filtered directly to the argon plasma
Excitation light source, spectral measurement.
3 Reagents
Unless otherwise indicated, as used in the analysis confirmed that only pure reagents superior grade 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
Aqueous ammonia (11).
3.4
hydrochloric acid (119).
3.5
hydrochloric acid wash (149).
3.6 cobalt standard stock solution
Weigh 0.1000g of cobalt [w (Co) >=99.99%], placed in 200mL beaker, add 20mL hydrochloric acid (3.2), completely dissolved by heating and then cooled and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution containing 1mL
100µg cobalt.
3.7 cobalt standard solution
Pipette 10.00mL cobalt standard stock solution (3.6) in 100mL volumetric flask (3.4) diluted to the mark with hydrochloric acid
Degree, this solution 1mL containing 10µg cobalt.
3.8 Argon
volume fraction of greater than 99.99%.
4 Instrument
Inductively coupled plasma atomic emission spectroscopy. resolution of less than 0.006nm (200nm office).
5 Sample
5.1
tungsten should smash through the 0.125mm sieve.
......
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 4324.7
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4324.7-2012 | Methods for chemical analysis of tungsten - Part 7: Determination of cobalt content - Inductively coupled plasma atomic emission spectrometry | current edition | Current |
| GB/T 4324.7-1984 | Methods for chemical analysis of tungsten - Part 7: Determination of cobalt content - Inductively coupled plasma atomic emission spectrometry | previous edition | Superseded |
This page sells the current edition, GB/T 4324.7-2012. 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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