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GB/T 4324.6-2012: Methods for chemical analysis of tungsten -- Part 6: Determination of iron content. 1, 10-phenanthroline spectrophotometry
Status: Valid GB/T 4324.6: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4324.6-2012 | English | 189 |
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Methods for chemical analysis of tungsten -- Part 6: Determination of iron content. 1, 10-phenanthroline spectrophotometry
| Valid |
GB/T 4324.6-2012
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| GB/T 4324.6-1984 | English | 199 |
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Methods for chemical analysis of tungsten--The ortho-phenanthroline photometric method for the determination of iron content
| Obsolete |
GB/T 4324.6-1984
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PDF similar to GB/T 4324.6-2012
Basic data | Standard ID | GB/T 4324.6-2012 (GB/T4324.6-2012) | | Description (Translated English) | Methods for chemical analysis of tungsten -- Part 6: Determination of iron content. 1, 10-phenanthroline spectrophotometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H63 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 8,856 | | Older Standard (superseded by this standard) | GB/T 4324.6-1984 | | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | | Issuing agency(ies) | General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 amount of tungsten iron determination. This section applies to tungsten powder, tungsten, tungsten trioxide, tungsten blue, purple, tungsten, tungsten acid, ammonium metatungstate paratungstate and the determination of the amou | GB/T 4324.6-2012: Methods for chemical analysis of tungsten -- Part 6: Determination of iron content. 1, 10-phenanthroline 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.
Methods for chemical analysis of tungsten Part 6. Determination of iron content 1, 10-phenanthroline spectrophotometry.
ICS 77.120.99
H63
National Standards of People's Republic of China
Replacing GB/T 4324.6-1984
Chemical analysis of tungsten
Part 6. Determination of iron content
Phenanthroline spectrophotometry
Part 6. Determinationofironcontent-
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 Section 64324 of.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 4324.6-1984 "chemical analysis of tungsten phenanthroline spectrophotometric determination of iron content." This portion
GB/T 4324.6-1984 compared to the main technical changes are as follows.
--- To increase the scope of the "blue tungsten, tungsten purple, ammonium paratungstate and tungsten carbide";
--- Measured by the number of "Weigh triplicate determination" to "independently measured twice";
--- Supplementary terms of precision;
--- Added "preface" and content "Test Report", a standard format and made editorial changes.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is drafted. Northwest Nonferrous Metal Research Institute, West An Kaili Chemical Co., Ltd. Western Metal Materials Co., Ltd., Ganzhou
Nonferrous Metallurgy Research Institute, Shenzhen High-tech Co., Ltd. Grammy, Benxi City, tungsten and molybdenum products factory.
The main drafters of this section. Lu Ni, Li Bo, Zhang Xiang, Zhang Danli, Julie, Juan, Li Tuo, Xie Lu, Ducai Yun, Ma Lin, Li Xiuyun,
Criminal Xiaoming, Tseng Yung Kang.
This part of the standard replaces the previous editions are.
--- GB/T 4324.6-1984.
Chemical analysis of tungsten
Part 6. Determination of iron content
Phenanthroline spectrophotometry
1 Scope
GB/T 4324 provisions of this part of the determination of tungsten in iron content.
This Part applies to tungsten powder, tungsten trioxide, tungsten, tungsten blue, purple tungsten, tungsten acid, ammonium metatungstate, ammonium paratungstate and determination of the amount of iron carbide,
Determination range of 0.0005% to 0.10%.
2 Method summary
Sample after sulfuric acid - ammonium sulfate decomposition, citric acid complex of tungsten at pH = 7, the reduction of hydroxylamine with hydrochloric acid, iron (Ⅱ) with phenanthroline
Orange-red complex to generate, measure the absorbance.
3 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.
3.1 potassium iodide.
3.2 chloroform.
3.3 sulfuric acid (ρ = 1.84g/mL), pure class distinctions.
Aqueous ammonia 3.4 (ρ = 0.90g/mL).
3.5 sodium perchlorate solution. Pipette 200mL perchloric acid (11) with sodium hydroxide solution (400g/L) was adjusted to pH = 7 (using pH paper
an examination).
3.6 phenanthroline solution (3g/L). Weigh 0.3g Orthopenanthroline placed 300mL beaker, add 10mL ethanol, and dissolved
Diluted with water to 100mL, and mix.
3.7 hydroxylamine hydrochloride solution (200g/L). Purification steps are as follows. Weigh 50g of hydroxylamine hydrochloride placed in 500mL beaker, 150mL
Dissolved in water with ammonia (3.4) was adjusted to pH = 7 (check with pH paper), was added 20mL phenanthroline solution (3.6), heated to boiling, take
Cooling, add 3g of potassium iodide (3.1), dissolved water transferred into a separating funnel and diluted to 250mL, (3.2) and extracted with chloroform Number
Times (20mL, shaking 2min) until the organic phase was colorless. The organic phase was discarded, the aqueous phase into the vial and set aside.
3.8 ammonium sulfate solution (500g/L). Purification steps are as follows. Weigh 250g ammonium sulfate dissolved in 400mL of water with ammonia (3.4) adjusted
pH = 7 (check with pH paper), sodium perchlorate solution was added 2.5mL (3.5), 2mL hydroxylamine hydrochloride solution (3.7), 3mL o-
Philippine solution (3.6), bring to the boil. After adding 3g of potassium iodide to be dissolved, with rapid quantitative filter paper in a separatory funnel, and diluted with water
To 500mL. Add 20mL ~ 30mL chloroform (3.2), the oscillation 2min, after resting stratification, the organic phase discarded, the aqueous phase was repeatedly trichloroacetic
Methane (3.2) was extracted to the organic phase was colorless and the aqueous phase into the vial and set aside.
3.9 citric acid solution (500g/L). Purification steps are as follows. Weigh 250g of citric acid, placed in 1000mL beaker, add water 200mL
Dissolved, aqueous ammonia (3.4) was adjusted to pH = 7 (check with pH paper), was added 20mL phenanthroline solution (3.7), heated to boiling, add
3g potassium iodide (3.1), dissolved by rapid quantitative filter paper in a separating funnel, and diluted with water to 500mL, with chloroform
(3.2) and extracted several times (each 20mL, shaking 2min) until the organic phase was colorless, organic phase was discarded and the aqueous phase into the vial and set aside.
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