GB/T 4324.26-2012 English PDF

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GB/T 4324.26-2012: Methods for chemical analysis of tungsten -- Part 26: Determination of nitrogen content -- Pulse heating inert gas fusion-thermal conductive method and the Nessler reagent spectrophotometry
Status: Valid

GB/T 4324.26: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4324.26-2012	209	Add to Cart	3 days	Methods for chemical analysis of tungsten -- Part 26: Determination of nitrogen content -- Pulse heating inert gas fusion-thermal conductive method and the Nessler reagent spectrophotometry	Valid
GB/T 4324.26-1984	199	Add to Cart	2 days	Methods for chemical analysis of tungsten--The Nessler reagent photometric method for the determination of nitrogen content	Obsolete

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Basic data

Standard ID: GB/T 4324.26-2012 (GB/T4324.26-2012)
Description (Translated English): Methods for chemical analysis of tungsten -- Part 26: Determination of nitrogen content -- Pulse heating inert gas fusion-thermal conductive method and the Nessler reagent spectrophotometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H63
Classification of International Standard: 77.120.99
Word Count Estimation: 9,927
Older Standard (superseded by this standard): GB/T 4324.26-1984
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 bar of nitrogen determination method. This section applies to the determination of nitrogen in tungsten. Method one determination range of 0. 0005% 0. 040%, second method determination range of 0. 0010

GB/T 4324.26-2012: Methods for chemical analysis of tungsten -- Part 26: Determination of nitrogen content -- Pulse heating inert gas fusion-thermal conductive method and the Nessler reagent spectrophotometry

---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.
ICS77.120.99 H63 National Standards of People's Republic of China Replacing GB/T 4324.26-1984 Chemical analysis of tungsten Part 26. Determination of nitrogen content The pulse heating inert gas fusion - thermal conductivity method and Nessler reagent Part 26. Determinationofnitrogencontent- Issued on. 2013-10-01 2012-12-31 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 part is Part 26 GB/T 4324's. Rules in this section in accordance with GB/T 1.1-2009 given draft. This Part replaces GB/T 4324.26-1984 "spectrophotometric determination of chemical analysis of tungsten nitrogen Nessler reagent", and GB/T 4324.26- Compared to 1984, the main technical changes are as follows. --- Added "pulse heating inert gas fusion - thermal conductivity method"; --- Supplementary terms of the test report. The method of the present part II of the arbitration analysis. 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. Zhang Jie, Zhang Ying, Li Rui, Chen Guohua, Chen Fujuan, Peng Yu, a new layer of stone, Wang Kuan, Zhuang Yichun, new Xiao, Xiong Xiaoyan. This part of the standard replaces the previous editions are. --- GB/T 4324.26-1984. Chemical analysis of tungsten Part 26. Determination of nitrogen content The pulse heating inert gas fusion - thermal conductivity method and Nessler reagent Spectrophotometry

1 Scope

This section GB/T 4324 provisions of the tungsten powder, tungsten determination of nitrogen content. This section applies to the determination of tungsten in the nitrogen determination method for a range of 0.0005% - 0.040%; Method 2 measuring ranges 0.0010% to 0.0050%.

2 General

Unless otherwise indicated, this part of the reagents used are in line with national standards or industry standard analytical reagent, the water are distilled water. 3 a method of pulse heating inert gas fusion - thermal conductivity method 3.1 Method summary Sample was placed in a high purity graphite crucible, in a helium atmosphere at a low voltage and high current high temperature molten form molecular nitrogen is extracted, and the other After separating the extract gas, thermal conductivity measurement. 3.2 Materials and reagents 3.2.1 Helium. the volume fraction of not less than 99.995%. 3.2.2 High-purity nickel foil or a nickel bag. the nitrogen content is not more than 0.0002%. 3.2.3 High-purity graphite crucible. 3.2.4 copper oxide. granular. 3.2.5 magnesium perchlorate. Anhydrous. Note. To prevent an explosion, the agent should avoid contact with organic matter, especially should pay particular attention when discarded. 3.2.6 Efficient carbon dioxide absorbent. 3.2.7 glass wool. 3.2.8 Nitrogen certified reference materials. 3.3 Instrument Pulse heating thermal conductivity azotometer. Instrument sensitivity is not less than 0.01μg/g. 3.4 Sample 3.4.1 powder sample required by 0.180mm sieve, with premeasured nickel foil or a nickel bag tightly wrapped, and then weighing the sample and nickel foil Of the total, was subtracted mass of the sample. 3.4.2 bulk sample on the silicon carbide grinder gently polishing the surface, and then in a clean mortar carbide hammer on a diameter of about 5mm, ......

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