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GB/T 4324.25-2012 English PDF

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GB/T 4324.25-2012: Methods for chemical analysis of tungsten -- Part 25: Determination of oxygen content -- Pulse heating inert gas fusion-infrared absorption method
Status: Valid

GB/T 4324.25: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 4324.25-2012English169 Add to Cart 3 days [Need to translate] Methods for chemical analysis of tungsten -- Part 25: Determination of oxygen content -- Pulse heating inert gas fusion-infrared absorption method Valid GB/T 4324.25-2012
GB/T 4324.25-1984English239 Add to Cart 2 days [Need to translate] Methods for chemical analysis of tungsten--The inert gas fusion-coulometric titration method for the determination of oxygen content Obsolete GB/T 4324.25-1984

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Basic data

Standard ID GB/T 4324.25-2012 (GB/T4324.25-2012)
Description (Translated English) Methods for chemical analysis of tungsten -- Part 25: Determination of oxygen content -- Pulse heating inert gas fusion-infrared absorption method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H63
Classification of International Standard 77.120.99
Word Count Estimation 7,751
Older Standard (superseded by this standard) GB/T 4324.25-1984
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 and its products in the method of measuring the amount of oxygen. This section applies to tungsten and its products in the oxygen content. Determination range of 0. 0005% ~ 1. 0O%.

GB/T 4324.25-2012: Methods for chemical analysis of tungsten -- Part 25: Determination of oxygen content -- Pulse heating inert gas fusion-infrared absorption method


---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 25. Determination of oxygen content Pulse heating inert gas fusion-infrared absorption method ICS 77.120.99 H63 National Standards of People's Republic of China Replacing GB/T 4324.25-1984 Chemical analysis of tungsten Part 25. Determination of oxygen The pulse heating inert gas fusion - infrared absorption method Part 25. Determinationofoxygencontent- 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 Section 25 of the 4324. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 4324.25-1984 "chemical analysis of tungsten inert gas fusion - coulometric titration method for the determination of oxygen." This portion GB/T 4324.25-1984 compared to the main technical changes are as follows. --- Determination by the inert gas fusion - coulometric titration method to the inert gas fusion - infrared absorption method; --- Expand the measurement range. measurement range from "0.0005% to 0.80%" to "0.0005% to 1.00%." The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized. This section is drafted. Zhuzhou Cemented Carbide Group Co., Ltd., Northwest Nonferrous Metal Research Institute, Guangzhou Nonferrous Metal Research Institute. The main drafters of this section. Jiang Yafang, Zhang Ying, a new layer of stone, Wang Kuan, Zhuang Yichun, Zhu Jie, Peng Yu, Zhao Sheng Zhi, Xiao new, Redevex school. This part of the standard replaces the previous editions are. --- GB/T 4324.25-1984. Chemical analysis of tungsten Part 25. Determination of oxygen The pulse heating inert gas fusion - infrared absorption method

1 Scope

GB/T 4324 provisions of this part of the determination of tungsten products and the amount of oxygen. This section applies to tungsten and its products - Determination of the amount of oxygen. Determination range of 0.0005% to 1.00%.

2 Method summary

Degassed sample is placed in high temperature graphite crucible and heated and melted in the purification of argon/helium stream sample release oxygen to the graphite crucible The binding of carbon monoxide is formed (or heated rare-earth copper oxide to convert carbon monoxide to carbon dioxide), the carrier gas loaded infrared detector The pool was measured oxygen.

3 Materials and Reagents

3.1 Argon. purity of more than 99.95%. 3.2 Helium. purity of greater than 99.995%. 3.3 high-purity nickel foil or a nickel bag. the oxygen content is less than 0.0010%. 3.4 rare earth copper oxide. loose particles (0.75 ~ 0.5) mm. 3.5 alkali asbestos or efficient carbon dioxide absorbents (0.75 ~ 0.5) mm. 3.6 anhydrous magnesium perchlorate or efficient water-absorbing agent (1.5 ~ 0.75) mm. 3.7 high-purity graphite crucible. 3.8 Standard substance. metal oxygen CRMs.

4 Instrument

Pulse heating - infrared instrument for oxygen. Instrument sensitivity is not less than 0.01μg/g.

5 Sample

5.1 powder sample pre-treatment and wrapped tightly in foil weighed nickel or nickel bag (3.3), then the total amount of the sample was weighed and a nickel foil or a nickel bag, subtraction Get quality sample. Sample analysis should days. 5.2 bulk sample removed epidermis, clean carbide mortar hammer broke into a diameter of about 2mm ~ 5mm, the quality of 0.5g ~ 1.0g About particles weighing. Day sample analysis should be treated. 5.3 The specimen shall be placed in the dryer to save.

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