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GB/T 4324.21-2012: Methods for chemical analysis of tungsten -- Part 21: Determination of chromium content -- Inductively coupled plasma atomic emission spectrometry
Status: Valid GB/T 4324.21: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4324.21-2012 | English | 189 |
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Methods for chemical analysis of tungsten -- Part 21: Determination of chromium content -- Inductively coupled plasma atomic emission spectrometry
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GB/T 4324.21-2012
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| GB/T 4324.21-1984 | English | 199 |
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Methods for chemical analysis of tungsten--The diphenylcarbazide photometric method for the determination of chromium content
| Obsolete |
GB/T 4324.21-1984
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Basic data | Standard ID | GB/T 4324.21-2012 (GB/T4324.21-2012) | | Description (Translated English) | Methods for chemical analysis of tungsten -- Part 21: Determination of chromium 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| H63 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 8,870 | | Older Standard (superseded by this standard) | GB/T 4324.21-1984 | | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | | Issuing agency(ies) | General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, tungstic acid, ammonium metatungstate, according to Jones Lang ammonium tungstate, blue tungsten, tungsten and tungsten carbide purple Determination of chromium content. This sectio | GB/T 4324.21-2012: Methods for chemical analysis of tungsten -- Part 21: Determination of chromium 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 21. Determination of chromium content Inductively coupled plasma atomic emission spectrometry
ICS 77.120.99
H63
National Standards of People's Republic of China
Replacing GB/T 4324.21-1984
Chemical analysis of tungsten
Part 21. Determination of chromium content
Inductively coupled plasma atomic emission spectrometry
Part 21. Determinationofchromiumcontent-
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 214,324.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 4324.21-1984 "spectrophotometric determination of chromium content chemical analysis of tungsten diphenyl carbon acid dihydrazide." This portion
GB/T 4324.21-1984 compared to the main changes are as follows.
--- Inductively coupled plasma emission spectrometry chromium content;
--- Increased tungsten carbide, tungsten blue, ammonium paratungstate analysis of the sample, and the sample dissolution methods complement samples;
--- Determination range of 0.0002% to 0.02%.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is drafted. Beijing Nonferrous Metal Research Institute, Research Institute of Nonferrous Metals, Guangzhou, Xiamen Golden Egret Special Alloy Co., Ltd.
The main drafters of this section. Cai-Xia Chen, Li, Zhang Diankai, Zhang Zhuo, Wang Jin, Zhuang Yichun, Xiong Xiaoyan, Zhang Shubin, Zhuang Yingying.
This part of the alternative criteria previously issued as follows.
--- GB/T 4324.21-1984.
Chemical analysis of tungsten
Part 21. Determination of chromium content
Inductively coupled plasma atomic emission spectrometry
1 Scope
This section GB/T 4324 provisions of the tungsten powder, tungsten trioxide, tungsten, tungsten acid, ammonium metatungstate, ammonium paratungstate, tungsten blue, purple tungsten and tungsten carbide
Determination of chromium content.
This Part applies to tungsten powder, tungsten, tungsten, tungsten acid, ammonium metatungstate, ammonium paratungstate, tungsten blue, purple tungsten carbide and chromium content was measured trioxide.
Determination range of 0.0002% to 0.02%.
2 principle of the method
Sample with hydrogen peroxide, ammonia dissolved in hydrochloric acid precipitation separation matrix. Inductively coupled plasma atomic emission spectroscopy to recommend
Analysis line wavelength measuring the emission intensity of the test solution of chromium, chromium concentration obtained from the working curve method, the 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).
3.2 hydrochloric acid (ρ = 1.19g/mL).
3.3 Ammonia (11), with the MOS level ammonia preparation.
3.4 hydrochloric acid (119).
3.5 hydrochloric acid (149).
3.6 Chromium standard stock solution. Weigh 0.1000g chromium (mass fraction greater than 99.99%), placed in 100mL beaker, add
25mL hydrochloric acid (3.2), cooled to room temperature after heating was dissolved and transferred to 100mL volumetric flask, dilute with water to volume, and mix. This solution
1mL containing 1.00mg chromium.
3.7 Chromium Standard Solution A. Pipette 10.00mL chromium standard stock solution (3.6) placed in 100mL flask, add 5mL hydrochloric acid
(3.2), diluted with water to volume, and mix. This solution 1mL containing 100μg chromium.
3.8 Chromium standard solution B. Pipette 10.00mL chromium standard solution (3.7) were placed in 100mL volumetric flask, was added 5mL hydrochloric acid (3.2) to
Dilute with water to volume, and mix. This solution 1mL containing 10μg chromium.
3.9 Argon. volume fraction of not less than 99.99%
4 Instrument
4.1 Inductively coupled plasma spectrometer with a resolution of < 0.006nm (200nm office).
4.2 Recommended chromium analytical line wavelength 357.868nm.
4.3 chromium detection limit of 0.014μg/mL, measured limit of 0.070μg/mL.
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