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GB/T 5121.23-2008: Methods for chemical analysis of copper and copper alloys -- Part 23: Determination of silicon content
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Methods for chemical analysis of copper and copper alloys -- Part 23: Determination of silicon content
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GB/T 5121.23-2008
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| GB/T 5121.23-1996 | English | 399 |
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Copper and copper alloys--Determination of silicon content
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GB/T 5121.23-1996
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Basic data | Standard ID | GB/T 5121.23-2008 (GB/T5121.23-2008) | | Description (Translated English) | Methods for chemical analysis of copper and copper alloys -- Part 23: Determination of silicon content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.30 | | Word Count Estimation | 13,135 | | Date of Issue | 2008-06-17 | | Date of Implementation | 2008-12-01 | | Older Standard (superseded by this standard) | GB/T 5121.23-1996; GB/T 13293.11-1991 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.10 (Total No.123) | | 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 method for determination of copper and copper alloy silicon content. This method is suitable for the determination of copper and copper alloy silicon content. Measurement range: 0. 0001% to 0. 025%. Method two molybdenum blue spectrophotometric method provides for the determination of copper and copper alloy silicon content. This method is suitable for the determination of copper and copper alloy silicon content. Measuring range: > 0. 025% to 0. 40%. Method three gravimetric method This method provides for determination of copper and copper alloy silicon content. This method is suitable for the determination of copper and copper alloy silicon content. Measuring range | GB/T 5121.23-2008: Methods for chemical analysis of copper and copper alloys -- Part 23: Determination of silicon content
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Methods for chemical analysis of copper and copper alloys Part 23. Determination of silicon content
ICS 77.120.30
H13
National Standards of People's Republic of China
Replacing GB/T 5121.23-1996, GB/T 13293.11-1991
Copper and copper alloys -
Part 23. Determination of silicon content
Posted 2008-06-17
2008-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 5121 "Copper and copper alloy chemical analysis method" a total of 27 sections.
--- Part 1. Determination of copper content;
--- Part 2. Determination of phosphorus content;
--- Part 3. Determination of lead content;
--- Part 4. Carbon, Determination of sulfur content;
--- Part 5. Determination of nickel content;
--- Part 6. Determination of bismuth content;
--- Part 7. Determination of arsenic content;
--- Part 8. Determination of oxygen content;
--- Part 9. Determination of iron content;
--- Part 10. Determination of tin content;
--- Part 11. Determination of zinc content;
--- Part 12. Determination of antimony content;
--- Part 13. Determination of aluminum content;
--- Part 14. Determination of manganese content;
--- Part 15. Determination of cobalt content;
--- Part 16. Determination of chromium content;
--- Part 17. Determination of beryllium content;
--- Part 18. Determination of magnesium content;
--- Part 19. Determination of silver content;
--- Part 20. Determination of zirconium content;
--- Part 21. Determination of titanium content;
--- Part 22. Determination of cadmium content;
--- Part 23. Determination of silicon content;
--- Part 24. selenium, tellurium content was measured;
--- Part 25. Determination of boron content;
--- Part 26. Determination of mercury content;
--- Part 27. Inductively coupled plasma atomic emission spectrometry.
Division is divided into 23 sections.
This section includes a method, second method, Method three.
This Part replaces GB/T 5121.23-1996 "Copper and copper alloys - Determination of silicon content", GB/T 13293.11-
1991 "Determination of silicon content of high purity copper cathode - Molybdenum blue spectrophotometric method."
This portion of the GB/T 5121.23-1996, GB/T 13293.11-91 compared to the main changes are as follows.
--- One method of GB/T 13293.11-1991 GB/T 5121.23-1996 and "the first to extract molybdenum blue method
Spectrophotometry "integration amendment. Original standard measurement range from 0.0001% to 0.0020% and 0.0010% ~
Revised to 0.025% from 0.0001% to 0.025% supplemented with quality assurance and control provisions, increasing the precision of the terms;
--- Second method is GB/T 5121.23-1996 in "The second method Molybdenum blue spectrophotometry" amendment complements the quality
Assurance and control provisions, increasing the precision of the terms;
--- Method three is GB/T 5121.23-1996 in "third method 3 wt Law" amendment complements the quality assurance and control
Clauses, increasing the precision of the terms.
This section Appendix A normative appendix.
This part is proposed by the China Nonferrous Metals Industry Association.
The non-ferrous metal part by the National Standardization Technical Committee.
This section Chinalco Luoyang Copper Co., Ltd., Beijing General Research Institute of Mining and Metallurgy, China Nonferrous Metals Industry is responsible Institute of Standards Metrology and Quality
Drafted.
A method in this section was drafted by Beijing General Research Institute of Mining and Metallurgy.
A part of this method by the Tongling Nonferrous Metals Group Holdings Limited, northwest Gansu plus copper limited liability company participated in the drafting.
The main drafters of this section a method. Feng advanced, Gao Ying Jian Xu Cui end.
The main part of a method of verification person. Wang Jinping, Zhao Yi, Luo Yongmei, Li Wenjun.
This section Second method, Method three Chinalco Luoyang Copper Co. drafted.
This section Second method, Method three by the Tongling Nonferrous Metals Group Holdings Co., Ltd., Northwest Gansu copper plus limited liability companies to participate in the drafting.
Method Two main drafters of this section. Zhang Jinghua, Guochao Xia, Liu Aiju, Song Shunmao.
This section Method two main certifier. Wang Xia, Wang Jinping, Zhaozhen Lin.
Method three main drafters of this section. Zhang Jinghua, Liu Aiju, Guochao Xia, Song Shunmao.
The method in this section are three main certifier. Yang Guiping, Wang Jinping, Liu Yan.
This part of the standard replaces the previous editions are.
--- GB/T 5121.23-1996, GB/T 13293.11-1991.
Copper and copper alloys -
Part 23. Determination of silicon content
1 a method of extraction - molybdenum blue spectrophotometric method
1.1 Scope
This method specifies the method for determination of copper and copper alloy silicon content.
This method is applicable to the determination of copper and copper alloy silicon content. Measurement range. 0.0001% to 0.025%.
1.2 Principle of the method
Sample was dissolved in nitric and evaporated to a thick syrup, hydrofluoric acid is added to dissolve the insoluble silica, aluminum potassium sulfate complexed with an excess of fluoride ion
child. In the range of pH1.0 ~ pH1.5, silicon and ammonium molybdate generate Si - Mo heteropoly acid in sulfuric acid medium with butanol, the organic phase was
Hydrazine sulfate and stannous restore the silicon molybdenum yellow into silicon molybdenum blue at 630nm wavelength spectrophotometer measured absorbance. Press work song
Line method to calculate the mass fraction of silicon.
1.3 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.
1.3.1 butanol.
1.3.2 ethanol.
1.3.3 sulfuric acid (1 + 3) BVⅢ.
1.3.4 nitric acid (1 + 1) BVⅢ.
1.3.5 nitric acid (1 + 6) BVⅢ.
1.3.6 hydrofluoric acid (1 + 1) BVⅢ.
1.3.7 ammonia water (1 + 1) BVⅢ.
1.3.8 potassium aluminum sulfate solution (150g/L).
1.3.9 ammonium molybdate solution (100g/L).
1.3.10 citric acid solution (500g/L).
1.3.11 Hydrazine sulfate solution (2.5g/L). Weigh 0.25g sulfate Hydrazine sulfate dissolved in 100mL [Ba (1/2H2SO4) = 0.5mol/L] in.
1.3.12 stannous chloride solution (50g/L). Weigh 5g stannous chloride (SnCl2 · 2H2O, superior grade pure) was dissolved in 50mL of hydrochloric acid (ρ1.19g/mL)
Diluted with water to 100mL, and mix. The time is now equipped with.
1.3.13 washing solution. in 82mL water, and 12mL sulfuric acid (1 + 3) solution, 6mL n-butanol and shake well.
1.3.14 silicon standard stock solution. Weigh 0.2142g silica (excellent pure) in a platinum crucible, 5g of sodium carbonate and potassium carbonate mixed
Co flux (2 + 1), mix well, cover, place warmed to 400 ℃ muffle furnace, continue to heat up to 900 ℃, melting 1h. Remove the cooled shift
Into Teflon beaker, heated flooding, boil until clear, cooled to room temperature. Moved into 1000mL volumetric flask, dilute to the mark with water
Degree, and mix. Immediately transferred to dry plastic bottle storage. This solution 1mL containing 100μg silicon.
1.3.15 Silicon standard solution. Pipette 5.00mL silicon standard stock solution (1.3.14) in 500mL volumetric flask, dilute to the mark,
Mix well. Immediately transferred to dry plastic bottles. This solution 1mL containing 1μg silicon.
1.4 Instrument
1.4.1 Carrier gas closed evaporator unit. Figure 1.
1.4.2 spectrophotometer.
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