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GB/T 4324.16-2012: Methods for chemical analysis of tungsten -- Part 16: Determination of loss content on ignition -- Gravimetric method
Status: Valid GB/T 4324.16: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4324.16-2012 | English | 139 |
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Methods for chemical analysis of tungsten -- Part 16: Determination of loss content on ignition -- Gravimetric method
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GB/T 4324.16-2012
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| GB/T 4324.16-1984 | English | 199 |
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Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of magnesium content
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GB/T 4324.16-1984
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Basic data | Standard ID | GB/T 4324.16-2012 (GB/T4324.16-2012) | | Description (Translated English) | Methods for chemical analysis of tungsten -- Part 16: Determination of loss content on ignition -- Gravimetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H63 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,625 | | Older Standard (superseded by this standard) | GB/T 4324.30-1984 | | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | | Issuing agency(ies) | General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 trioxide Determination of loss on ignition. This section applies to tungsten trioxide in the determination of loss on ignition. Determination range of 0. 05% to 1. 00%. | GB/T 4324.16-2012: Methods for chemical analysis of tungsten -- Part 16: Determination of loss content on ignition -- Gravimetric method
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Methods for chemical analysis of tungsten Part 16. Determination of loss content on ignition Gravimetric method.
ICS 77.120.99
H63
National Standards of People's Republic of China
Replacing GB/T 4324.30-1984
Chemical analysis of tungsten
Part 16. Determination of loss on ignition
Gravimetric method
Part 16. Determinationoflosscontentonignition-
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 164,324.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 4324.30-1984 "Determination of loss on ignition chemical analysis of tungsten - The gravimetric method." This portion
GB/T 4324.30-1984 compared to the main changes are as follows.
--- 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., Zhuzhou Cemented Carbide Group Co.
the company.
The main drafters of this section. Wang Caiyun, Lin Huirong, Zhang Shubin, Wangji Shen, Zhuang Yingying, easy Jianbo, Zhang Ying.
This part of the standard replaces the previous editions are.
--- GB/T 4324.30-1984.
Chemical analysis of tungsten
Part 16. Determination of loss on ignition
Gravimetric method
1 Scope
GB/T 4324 This section specifies the method for determination of loss on ignition of tungsten trioxide.
This section applies to the determination of tungsten trioxide in the loss of ignition. Measurement range of 0.05% to 1.00%.
2 Method summary
Tungsten trioxide at 780 ℃ ~ 800 ℃ burning, wherein water, salt and volatile substances to escape, the loss in mass for the ignition loss.
Step 3 Analysis
3.1 Sample
Weigh 2.00g sample, accurate to 0.0001g.
3.2 Determination of the number of
Independently measured twice and averaged.
3.3 Determination
3.3.1 The porcelain crucible placed 780 ℃ ~ 800 ℃ high temperature furnace burning 1h, after removing coolish cool to room temperature in desiccator, weigh. again
The porcelain crucible placed 780 ℃ ~ 800 ℃ high temperature furnace burning 0.5h, after removing coolish placed in a desiccator to cool to room temperature (cooling time should be
The previous agreement), weighing. Repeat until constant weight.
3.3.2 The sample (3.1) into constant weight porcelain crucible, placed 780 ℃ ~ 800 ℃ high temperature furnace burning 2h, after removing the cooling set
Dryer cooled to room temperature (cooling time should be consistent with an empty crucible cooling time), weighed. Then porcelain crucible at 780 ℃ ~ 800 ℃ high temperature furnace
The burning 0.5h, removed after cooling placed in a desiccator cooled to room temperature (cooling time should be consistent with an empty crucible cooling time), weighed. Repeat this
Operating until constant weight.
Calculation results of the analysis of 4
Ignition loss amount w ignition loss amount, expressed in%, according to equation (1).
w = loss on ignition
m1-m2
m × 100
(1)
Where.
m --- Sample volume in units of grams (g);
m1 --- burning in front of the sample with constant weight porcelain crucible mass in grams (g);
M2 --- After burning the sample with a porcelain crucible mass in grams (g).
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