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GB/T 4324.18-2012: Methods for chemical analysis of tungsten -- Part 18: Determination of potassium content -- Flame atomic absorption spectrometry
Status: Valid GB/T 4324.18: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4324.18-2012 | English | 169 |
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Methods for chemical analysis of tungsten -- Part 18: Determination of potassium content -- Flame atomic absorption spectrometry
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GB/T 4324.18-2012
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| GB/T 4324.18-1984 | English | 199 |
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Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of potassium content
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GB/T 4324.18-1984
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PDF similar to GB/T 4324.18-2012
Basic data | Standard ID | GB/T 4324.18-2012 (GB/T4324.18-2012) | | Description (Translated English) | Methods for chemical analysis of tungsten -- Part 18: Determination of potassium content -- Flame atomic absorption spectrometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H63 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 7,727 | | Older Standard (superseded by this standard) | GB/T 4324.18-1984 | | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | | Issuing agency(ies) | General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 carbide, tungsten trioxide, tungsten blue, purple, tungsten, tungsten acid, ammonium paratungstate, metatungstate Determination of the amount of potassium. This section applies to tungsten po | GB/T 4324.18-2012: Methods for chemical analysis of tungsten -- Part 18: Determination of potassium content -- Flame atomic absorption 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 18. Determination of potassium content Flame atomic absorption spectrometry.
ICS 77.120.99
H63
National Standards of People's Republic of China
Replacing GB/T 4324.18-1984
Chemical analysis of tungsten
Part 18. Determination of the amount of potassium
Flame Atomic Absorption Spectrometry
Part 18. Determinationofpotassiumcontent-
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 184,324.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 4324.18-1984 "chemical analysis of tungsten atomic absorption spectrophotometric method for determination of potassium content." This portion
GB/T 4324.18-1984 compared to the main changes are as follows.
--- Scope added tungsten carbide, tungsten blue, purple tungsten, ammonium paratungstate;
--- Increased tungsten carbide, tungsten blue, purple tungsten, ammonium paratungstate dissolving method;
--- Abolition of the "citric acid complex tungsten" operation;
--- Instead of the original single in "working curve drawing" in the switch matrix matched standard curve and non-standard base curve of hyperbolic method
Line method;
--- The "measurement frequency" in the "three" to "secondary";
--- Increased repeatability terms.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is drafted. Xiamen Tungsten Co., Ltd., Xiamen Golden Egret Special Alloy Co., Ltd., Beijing Nonferrous Metal Research Institute, strains
Chau Carbide Group Limited.
The main drafters of this section. Wang Caiyun, Lin Huirong, Zhang Shubin, soup tin five Zhuang Yingying, Lee Man Chi, Zhangdian Kai, Chen Caixia.
This part of the standard replaces the previous editions are.
--- GB 4324.18-1984.
Chemical analysis of tungsten
Part 18. Determination of the amount of potassium
Flame Atomic Absorption Spectrometry
1 Scope
This section GB/T 4324 provisions of the tungsten powder, tungsten, tungsten carbide, tungsten trioxide, tungsten blue, purple tungsten, tungsten acid, ammonium paratungstate, ammonium metatungstate
Determination of the amount of potassium.
This Part applies to tungsten powder, tungsten, tungsten carbide, tungsten trioxide, tungsten blue, purple tungsten, tungsten acid, ammonium paratungstate, ammonium metatungstate measured amount of potassium.
Determination range of 0.0005% to 0.080%.
2 Method summary
Tungsten powder, tungsten, tungsten carbide, tungsten blue, purple tungsten with hydrogen peroxide and ammonia decomposition; tungsten trioxide, tungstic acid, ammonium paratungstate, ammonium metatungstate with ammonia
break down. Cesium chloride as deionization agent, atomic absorption spectrometer, potassium measured absorbance at a selected optimum working conditions.
3 Reagents
Unless otherwise indicated, the reagents used are standard in line with national standards or industry standard analytical reagent, the water should meet the resistivity
≥18MΩ · cm.
3.1 Ammonia (ρ = 0.88g/mL), pure class distinctions.
3.2 Hydrogen peroxide (ρ = 1.10g/mL), pure class distinctions.
3.3 cesium chloride solution (20g/L).
3.4 Potassium standard stock solution. Weigh 0.1907g advance by burning 550 ℃ 1h potassium chloride (wKCl≥99.9%), placed in a quartz beaker
In, dissolved in water and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. Stored in a plastic bottle, the solution containing 1mL
100μg potassium.
3.5 Potassium standard solution. Pipette 25.00mL potassium standard stock solution (3.4), placed in 500mL volumetric flask, dilute to the mark with water, mix
uniform. Stored in a plastic bottle, 1mL solution containing 5μg potassium.
3.6 tungsten matrix. the composition of the sample is similar to the potassium content of not more than 0.0005%.
4 Instrument
4.1 Atomic absorption spectrometer, with a potassium hollow cathode lamp.
Under optimum working conditions for those who can reach the following indicators can be used.
--- Characteristic concentration. in the solution was measured and consistent substrate solution, wherein the concentration of potassium is not more than 0.01μg/mL.
--- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed 1.5% of the average absorbance;
The lowest concentration of standard solution used (instead of "zero concentration" standard solution) absorbance measured 10 times, and the standard deviation should not exceed the maximum
0.5% concentration of the standard average absorbance.
--- Linear curve. the curve according to concentration, is divided into five sections, the difference between the absorbance of the absorbance difference between the highest and the lowest segment of the segment
Ratio of not less than 0.7.
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