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GB/T 4324.20-2012: Methods for chemical analysis of tungsten -- Part 20: Determination of vanadium content -- Inductively coupled plasma atomic emission spectrometry
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GB/T 4324.20-2012	English	189	Add to Cart	3 days [Need to translate]	Methods for chemical analysis of tungsten -- Part 20: Determination of vanadium content -- Inductively coupled plasma atomic emission spectrometry
GB/T 4324.20-1984	English	199	Add to Cart	2 days [Need to translate]	Methods for chemical analysis of tungsten--The N-benzoyl-N-phenylhydroxylamine photometric method for the determination of vanadium content

GB/T 4324.20-2012: Methods for chemical analysis of tungsten -- Part 20: Determination of vanadium content -- Inductively coupled plasma atomic emission spectrometry

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Methods for chemical analysis of tungsten Part 20. Determination of vanadium content Inductively coupled plasma atomic emission spectrometry ICS 77.120.99 H63 National Standards of People's Republic of China Replacing GB/T 4324.20-1984 Chemical analysis of tungsten Part 20. Determination of vanadium content Inductively coupled plasma atomic emission spectrometry Part 20. Determinationofvanadiumcontent- 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 Part of 204,324. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 4324.20-1984 "chemical analysis of tungsten, tantalum reagent spectrophotometric determination of vanadium content." This portion GB/T 4324.20-1984 compared to the main changes are as follows. --- Use Inductively Coupled Plasma Atomic Emission Spectrometry vanadium content; --- Criteria applicable to the determination of sample types increased tungsten carbide, tungsten blue, ammonium paratungstate; --- Measurement range to 0.0002% to 0.01%. The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized. This section is drafted. Beijing Nonferrous Metal Research Institute, General Research Institute for Nonferrous Metals, Guangzhou, Xiamen Golden Egret Special Materials Co., Ltd. The main drafters of this section. Li Na, Chen Caixia, Zhang Zhuo, Zhuang Yichun, Wang Jin, Xiong Xiaoyan, Zhang Shubin, Zhuang Yingying. This part of the alternative criteria previously issued as follows. --- GB/T 4324.20-1984. Chemical analysis of tungsten Part 20. Determination of vanadium content Inductively coupled plasma atomic emission spectrometry

1 Scope

GB/T 4324 provisions of this part of the tungsten powder, tungsten, tungsten carbide, tungsten trioxide, tungsten blue, purple tungsten, ammonium metatungstate, ammonium paratungstate vanadium content Measurement method. This Part applies to tungsten powder, tungsten, tungsten carbide, tungsten trioxide, tungsten blue, purple tungsten, ammonium paratungstate, the determination of vanadium in the amount of ammonium paratungstate. Determine In the range of 0.0002% to 0.01%.

2 Method summary

Sample with hydrogen peroxide, ammonia dissolved in hydrochloric acid precipitation separation matrix. Inductively coupled plasma atomic emission spectroscopy to recommend Measurement test solution of vanadium emission intensity at the wavelength of analytical line, obtained from the working curve method concentration of vanadium, mass fraction expressed determination result.

3 Reagents and materials

Unless otherwise indicated, used in the analysis confirmed only for the gifted class pure reagents and distilled or deionized water or equivalent purity. 3.1 Hydrogen peroxide (ρ = 1.10g/mL). Aqueous ammonia 3.2 (ρ = 0.90g/mL), MOS level. 3.3 hydrochloric acid (ρ = 1.19g/mL). 3.4 hydrochloric acid (119). 3.5 V standard stock solution. Weigh accurately 0.1785g vanadium pentoxide [w (V2O5) > 99.9%], sodium hydroxide solution was added 2mL (200g/L), heated until completely dissolved. Sulfuric acid was added 10mL (13) acidified dropwise a few drops of nitric acid (ρ = 1.14g/mL) and evaporated to take White smoke, remove it. Coolish, rinse the surface with a little water dish and cup wall, take fuming sulfuric acid again, the drive to make nitric acid. Coolish, transferred to 100mL volumetric flask The diluted with water to volume, and mix. This solution 1mL containing 1mg vanadium. 3.6 vanadium standard solution A. Pipette 10.00mL vanadium standard stock solution (3.5), placed in 100mL flask, add 5mL hydrochloric acid (3.3), dilute to the mark and mix. This solution 1mL containing 100μg vanadium. 3.7 vanadium standard solution B. Pipette 10.00mL vanadium standard solution (3.6), placed in 100mL volumetric flask, was added 5mL hydrochloric acid (3.3), Diluted with water to volume, and mix. This solution 1mL containing 10μg vanadium.

4 Instrument

4.1 Inductively coupled plasma spectrometer with a resolution of < 0.006nm (200nm office). 4.2 Recommended vanadium analytical line wavelength 292.401nm. The detection limit is 4.3 V 0.016μg/mL, measured limit of 0.080μg/mL. The maximum concentration of a solution of 4.4 V continuous measurement of five times the relative standard deviation of the absolute intensity of the emitted light should be less than 1%. 4.5 linear curve, the correlation coefficient greater than 0.999. ...