GB/T 4324.7-2012 English PDF

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GB/T 4324.7-2012: Methods for chemical analysis of tungsten -- Part 7: Determination of cobalt content -- Inductively coupled plasma atomic emission spectrometry
Status: Valid

GB/T 4324.7: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4324.7-2012	189	Add to Cart	3 days	Methods for chemical analysis of tungsten -- Part 7: Determination of cobalt content -- Inductively coupled plasma atomic emission spectrometry	Valid
GB/T 4324.7-1984	199	Add to Cart	2 days	Methods for chemical analysis of tungsten--The 5-cl-PADAB photometric method for the determination of cobalt content	Obsolete

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Basic data

Standard ID: GB/T 4324.7-2012 (GB/T4324.7-2012)
Description (Translated English): Methods for chemical analysis of tungsten -- Part 7: Determination of cobalt content -- Inductively coupled plasma atomic emission spectrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H63
Classification of International Standard: 77.120.99
Word Count Estimation: 8,855
Older Standard (superseded by this standard): GB/T 4324.7-1984
Regulation (derived from): National Standards Bulletin No. 41 of 2012
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the tungsten powder, tungsten, tungsten trioxide, tungsten blue, purple, tungsten, tungsten carbide, tungsten acid, ammonium metatungstate paratungstate Determination of cobalt content. This section applies to tungsten powder, tung

GB/T 4324.7-2012: Methods for chemical analysis of tungsten -- Part 7: Determination of cobalt content -- Inductively coupled plasma atomic emission spectrometry

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Methods for chemical analysis of tungsten Part 7. Determination of cobalt content Inductively coupled plasma atomic emission spectrometry ICS 77.120.99 H63 National Standards of People's Republic of China Replacing GB/T 4324.7-1984 Chemical analysis of tungsten Part 7. Determination of cobalt content Inductively coupled plasma atomic emission spectrometry Part 7. Determinationofcobaltcontent- Issued on. 2012-12-31 2013-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 4324 "chemical analysis of tungsten" is divided into 28 parts. --- Part 1. Determination of lead content - flame atomic absorption spectrometry; --- Part 2. Determination of bismuth content hydride generation atomic absorption spectrometry; --- Part 3. Determination of tin content hydride generation atomic absorption spectrometry; --- Part 4. Determination of antimony content hydride generation atomic absorption spectrometry; --- Part 5. Determination of arsenic content by hydride generation atomic absorption spectrometry; --- Part 6. Determination of iron content of phenanthroline spectrophotometry; --- Part 7. Determination of cobalt content by inductively coupled plasma atomic emission spectrometry; --- Part 8. Determination of the amount of nickel by inductively coupled plasma atomic emission spectrometry and flame atomic absorption spectrometry Diacetyldioxime Gravimetric method; --- Part 9. Determination of cadmium content by inductively coupled plasma atomic emission spectrometry and flame atomic absorption spectrometry; --- Part 10. Determination of copper content - Flame atomic absorption spectrometry; --- Part 11. Determination of aluminum content by inductively coupled plasma atomic emission spectrometry; --- Part 12. Determination of the amount of silicon tetrachloride - molybdenum blue spectrophotometric method; --- Part 13. Inductively coupled plasma calcium atomic emission spectrometry; --- Part 14. Chlorinated Volatile residue amount after Gravimetric method; --- Part 15. Determination of magnesium content - Flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry; --- Part 16. Determination of loss on ignition - Gravimetric method; --- Part 17. Determination of sodium content by flame atomic absorption spectrometry; --- Part 18. Determination of potassium content by flame atomic absorption spectrometry; --- Part 19. Determination of titanium content of two methane antipyrine spectrophotometry; --- Part 20. vanadium content - Inductively coupled plasma atomic emission spectrometry; --- Part 21. Determination of chromium content by inductively coupled plasma atomic emission spectrometry; --- Part 22. manganese content - Inductively coupled plasma atomic emission spectrometry; --- Part 23. Determination of sulfur content of combustion conductance method and frequency combustion infrared absorption method; --- Part 24. Determination of phosphorus content - Molybdenum blue spectrophotometric method; --- Part 25. Determination of oxygen pulse heating inert gas fusion - infrared absorption method; --- Part 26. Determination of nitrogen pulse heating inert gas fusion - thermal conductivity method and Nessler reagent spectrophotometric method; --- Part 27. Determination of carbon content in the high-frequency combustion infrared absorption method; --- Part 28. Determination of molybdenum content - Thiocyanate spectrophotometric method. This section GB/T 74324 Part of. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 4324.7-1984 "spectrophotometric determination of cobalt content of cobalt tungsten chemical analysis reagent." This portion GB/T 4324.7-1984 compared to the main changes are as follows. --- Methods of measurement "cobalt reagent photometric method" to "Inductively Coupled Plasma Atomic Emission Spectrometry"; --- Detection range from "0.0007% to 0.012%" to "0.0001% to 0.050%"; --- Increased repeatability terms; --- Modified tungsten powder, tungsten, tungsten oxide, tungstic acid, ammonium paratungstate the sample dissolution method, an increase of tungsten blue, purple tungsten, tungsten carbide, ammonium paratungstate The dissolving method. The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized. This section is drafted. Ganzhou Nonferrous Metallurgy Research Institute, Research Institute of Nonferrous Metals, Guangzhou, Xiamen Golden Egret Special Alloy Co., Ltd. The main drafters of this section. Liu Hong, Li Ying, Xiong Xiaoyan, Ye Chunsheng, Zhongdao Guo, Zhuang Yichun, Redevex school, Zhang Shubin, Zhang Yingying. This part of the standard replaces the previous editions are. --- GB/T 4324.7-1984. Chemical analysis of tungsten Part 7. Determination of cobalt content Inductively coupled plasma atomic emission spectrometry

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 (ρ = 1.10g/mL). 3.2 hydrochloric acid (ρ = 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. ......

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