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GB/T 13748.8-2013: Chemical analysis methods of magnesium and magnesium alloys -- Part 8: Determination of rare earth content -- Gravimetric method
Status: Valid GB/T 13748.8: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 13748.8-2013 | English | 169 |
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Chemical analysis methods of magnesium and magnesium alloys -- Part 8: Determination of rare earth content -- Gravimetric method
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GB/T 13748.8-2013
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| GB/T 13748.8-2005 | English | 319 |
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Chemical analysis methods of magnesium and magnesium alloy -- Determination of rare earth content -- Gravimetric method
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GB/T 13748.8-2005
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| GB/T 13748.8-1992 | English | 199 |
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Magnesium and its alloys--Determination of copper content-2, 9-dimethyl-1, 10-phenanthroline spectrophotometric method
| Obsolete |
GB/T 13748.8-1992
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PDF similar to GB/T 13748.8-2013
Basic data | Standard ID | GB/T 13748.8-2013 (GB/T13748.8-2013) | | Description (Translated English) | Chemical analysis methods of magnesium and magnesium alloys -- Part 8: Determination of rare earth content -- Gravimetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H12 | | Classification of International Standard | 77.120.20 | | Word Count Estimation | 7,788 | | Older Standard (superseded by this standard) | GB/T 13748.8-2005 | | Adopted Standard | ISO 2355-1972; NEQ | | Regulation (derived from) | National Standards Bulletin 2013 No. 17 | | 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 | The standard provides: Magnesium alloy rare earth content determination. This standard applies to: non-thorium content of rare earth magnesium alloys Determination. Measuring range | GB/T 13748.8-2013: Chemical analysis methods of magnesium and magnesium alloys -- Part 8: Determination of rare earth content -- Gravimetric method
---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.
Chemical analysis methods of magnesium and magnesium alloys Part 8.. Determination of rare earth content Gravimetric method.
ICS 77.120.20
H12
National Standards of People's Republic of China
Replacing GB/T 13748.8-2005
Magnesium and its alloys -
Part 8. Determination of rare earth content
Gravimetric method
Part 8. Determinationofrareearthcontent-
(ISO 2355. 1972, Chemicalanalysisofmagnesiumanditsaloys-
Determinationofrareearths-Gravimetricmethod, NEQ)
Issued on. 2014-05-01 2013-09-06 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 13748 "analysis methods of magnesium and magnesium alloys" is divided into 22 parts.
--- Part 1. Determination of aluminum content;
--- Part 2. Determination of tin content pyrocatechol violet spectrophotometry;
--- Part 3. Determination of lithium content Flame atomic absorption spectrometry;
--- Part 4. Determination of manganese content periodate spectrophotometry;
--- Part 5. Determination of yttrium content inductor coupled plasma atomic emission spectrometry;
--- Part 6. Determination of silver by flame atomic absorption spectrometry;
--- Part 7. Determination of zirconium content;
--- Part 8. rare earth content Gravimetric method;
--- Part 9. Determination of iron content phenanthroline spectrophotometry;
--- Part 10. Determination of silicon content - Molybdenum blue spectrophotometric method;
--- Part 11. Determination of beryllium content Eriochrome cyanine R spectrophotometry;
--- Part 12. Determination of copper content;
--- Part 13. Determination of lead content by flame atomic absorption spectrometry;
--- Part 14. Determination of nickel dimethylglyoxime spectrophotometry;
--- Part 15. Determination of zinc content;
--- Part 16. Determination of calcium content by flame atomic absorption spectrometry;
--- Part 17. potassium content and sodium content - Flame atomic absorption spectrometry;
--- Part 18. Determination of the chlorine content of silver chloride turbidimetric method;
--- Part 19. Determination of titanium content security for spectrophotometric morpholino than methane;
--- Part 20. ICP-AES determination of element contents;
--- Part 21. photoelectric direct reading atomic emission spectroscopy method element content;
--- Part 22. Determination of thorium content.
This section GB/T 13748 Part 8.
The object is to have a standard adoption of Part 1, Part 4, Section 7, Section 8, Section 9, Section 10, Section 12,
Part 14, Part 159 sections revised.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 13748.8-2005 "analysis of magnesium and magnesium alloy rare earth content - Gravimetric method."
This section compared with the GB/T 13748.8-2005, the main technical changes are as follows.
--- Measured by the scope of the expansion of 0.20% ~ 10.00% 0.20% 20.00%;
--- Increased rare earth content in 10.00% to 20.00% of the sample mass of 0.50g;
--- Increased rare earth content allows 10.00% to 20.00% of the difference of 0.50%;
--- Remove the "quality assurance and control" requirements;
--- To increase the "lab report" requirements.
This section uses redrafted reference method ISO 2355. 1972 "rare earth magnesium and magnesium alloys - Gravimetric method", and ISO 2355.
1972 non-equivalent.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is responsible for drafting units. Aluminum Corporation of China Zhengzhou Research Institute, China Nonferrous Metals Industry Quality Standards and Metrology Institute
The study.
Drafting this Part. Aluminum Corporation of China Zhengzhou Research Institute, Southwest Aluminum (Group) Co., Ltd.
The main drafters of this section. Liyue Ping, Shi Lei, Zhang North Korea, Zhang Wei-hua, Chen Xiongli, Denglan Hong.
This part of the standard replaces the previous editions are.
--- GB/T 13748.8-1992, GB/T 13748.8-2005.
Magnesium and its alloys -
Part 8. Determination of rare earth content
Gravimetric method
1 Scope
GB/T 13748 provisions of this part of the determination of magnesium alloy rare earth content.
This section applies to the determination of magnesium alloy element thorium in rare earth content free. Measuring range. 0.20% to 20.00%.
2 Method summary
The sample is dissolved with hydrochloric acid, precipitated with ammonia zirconium, sebacic acid medium with ammonia preliminary precipitation of rare earth elements, dissolving two kinds precipitate rare earth
Oxalate in the form of re-precipitation. Burning rare earth element oxides and weighed.
3 Reagents
3.1 ammonium chloride.
3.2 hydrochloric acid (ρ = 1.19g/mL).
3.3 Hydrogen peroxide (ρ = 1.10g/mL.)
3.4 Aqueous ammonia (11).
3.5 aqueous ammonia (14).
3.6 ammonia (149).
3.7 nitric acid - hydrogen peroxide solution. 30mL in 150mL of water was added nitric acid (ρ = 1.40g/mL), 30mL of hydrogen peroxide (3.3),
Mix well.
3.8 saturated solution of oxalic acid. Weigh 150g of oxalic acid dissolved in hot water 1000mL, after cooling, filtered.
3.9 oxalic acid washing solution. pipette 70mL of saturated solution of oxalic acid (3.8), dilute with water to 500mL.
3.10 sebacic acid solution (50g/L). Weigh 50g of sebacic acid were dissolved in 400mL ammonia (ρ = 0.90g/mL), add water 300mL, too
Diluted with filtered water to 1000mL, and mix. Stored in a polyethylene bottle.
3.11 bromophenol blue solution (4g/L). Weigh 0.4g bromophenol blue into a mortar, add 8.25mL sodium hydroxide solution (5g/L), grinding
Until completely dissolved, diluted with water to 100mL, and mix.
4 Instrument
4.1 high-temperature furnace. 1000 ℃ ± 20 ℃.
4.2 pH meter.
5 Sample
Thickness of less than 1mm debris.
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