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GB/T 5121.24-2008: Methods for chemical analysis of copper and copper alloys -- Part 24: Determination of selenium and tellurium content
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| GB/T 5121.24-2008 | English | 209 |
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Methods for chemical analysis of copper and copper alloys -- Part 24: Determination of selenium and tellurium content
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GB/T 5121.24-2008
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Basic data | Standard ID | GB/T 5121.24-2008 (GB/T5121.24-2008) | | Description (Translated English) | Methods for chemical analysis of copper and copper alloys -- Part 24: Determination of selenium and tellurium content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.30 | | Word Count Estimation | 9,934 | | Date of Issue | 2008-06-17 | | Date of Implementation | 2008-12-01 | | Older Standard (superseded by this standard) | GB/T 13293.1-1991 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.10 (Total No.123) | | Issuing agency(ies)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 selenium in copper and copper alloys, Determination of tellurium content. This method is suitable for copper and copper alloys selenium, Determination of tellurium content. Measuring range: ~ 0. 00030% 0. 00005%. Method Two flame atomic absorption spectrometry determination of the method provides copper and copper alloys of tellurium content. This method is suitable for the determination of copper and copper alloys of tellurium content. Measuring range: 0. 10% to 1. 00%. | GB/T 5121.24-2008: Methods for chemical analysis of copper and copper alloys -- Part 24: Determination of selenium and tellurium content
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Methods for chemical analysis of copper and copper alloys Part 24. Determination of selenium and tellurium content
ICS 77.120.30
H13
National Standards of People's Republic of China
Replacing GB/T 13293.1-1991
Copper and copper alloys -
Part 24. Determination of selenium, tellurium 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.
Part is divided into 24 sections.
This section includes a method, Method II.
This Part replaces GB/T 13293.1-1991 "the determination of selenium, tellurium copper chemical analysis of high catalytic oscillopolarographic law."
This section compared with the GB/T 13293.1-1991, the following changes.
--- One method of GB/T 13293.1-1991 amendments by hydride generation - instead of the original standard catalytic Atomic Fluorescence Spectrometry
Polarography supplemented with quality assurance and control provisions, increasing the precision of the terms;
--- Adds two. flame atomic absorption spectrometry determination range of 0.10% ~ 1.00% (GB/T 13293.1-1991 in
Measurement range of tellurium is. 0.00005% ~ 0.0003%, and GB/T 5121-1996 Method for determination of tellurium is no, our country now
The mass fraction of copper alloy tellurium horizontal line as follows. 0.40% - 0.70%).
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., responsible for drafting the Beijing Research Institute of Mining and Metallurgy, China Nonferrous Metals Industry Quality Standards and Metrology Institute
Responsible for drafting the study.
A method in this section by the Beijing General Research Institute of Mining and Metallurgy, Jinchuan Group Limited drafted.
This method a part in the drafting by the JCC.
The main drafters of this section a method. Yuan Yuxia, Feng advanced Lihua Chang, Yindong Xia, Lvqing Cheng, Zhao Quanmin.
The main part of a method of verification of people. Percentage light cents Lu Qiulan.
This section Method Two Chinalco Luoyang Copper Co. drafted.
The second method section by the Beijing Nonferrous Metal Research Institute, aluminum Shenyang Nonferrous Metals Processing Co., Ltd. participated in the drafting.
Method Two main drafters of this section. Xieli Yun, a good mountain peaks.
This section Method two main certifier. Zhuo, Hao Zhang, Guang Ling Yan, Liu Xia.
This part of the standard replaces the previous editions are.
--- GB/T 13293.1-1991.
Copper and copper alloys -
Part 24. Determination of selenium, tellurium content
1 a method of hydride generation - atomic fluorescence spectrometry
1.1 Scope
This method specifies the method for determination of copper and copper alloys of selenium, tellurium content.
This method is applicable to the determination of copper and copper alloy of selenium, tellurium content. Measurement range. ~ 0.00005% 0.00030%.
1.2 Principle of the method
The sample is dissolved in nitric acid to lanthanum hydroxide as a co-precipitating agent selenium, tellurium and interfering elements and a large copper base isolated and enriched to
Hydride - atomic fluorescence spectrometry determination of selenium, tellurium fluorescence intensity.
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 nitrate (ρ1.42g/mL) pure class distinctions
1.3.2 nitric acid (1 + 1)
1.3.3 hydrochloric acid (ρ1.19g/mL) pure class distinctions
1.3.4 hydrochloric acid (1 + 1)
1.3.5 Ammonia (ρ about 0.90g/mL)
1.3.6 ammonia (5 + 95)
1.3.7 lanthanum nitrate solution (20g/L). Weigh 11.730gLa2O3 40mL dissolved in nitric acid (1.3.2) and transferred to 500mL volumetric flask,
Diluted with water to the mark.
1.3.8 solution of potassium borohydride (15g/L). Weigh 15g of potassium borohydride dissolved in 1000mL potassium hydroxide solution (5g/L), a shake. use
When existing service.
1.3.9 selenium standard stock solution. Weigh 0.1000g pure selenium (selenium content ≥99.99%), placed in 150mL beaker, add
10mL of nitric acid (1.3.2), cover the surface of the pan, over low heat until completely dissolved and transferred to 1000mL volumetric flask, dilute to the mark with water, mix
Uniform, 1mL solution containing 100μg selenium.
1.3.10 selenium standard solution. Pipette 2.00mL selenium standard stock solution (1.3.9) in 200mL volumetric flask, was added 80mL of hydrochloric acid
(1.3.3), diluted with water to volume, and mix. This solution 1mL containing 1μg selenium.
1.3.11 tellurium standard stock solution. Weigh 0.1000g pure tellurium (Te mass fraction ≥99.99%), placed in 150mL beaker, add
10mL of nitric acid (1.3.2), cover the surface of the pan, over low heat until completely dissolved and transferred to 1000mL volumetric flask, dilute to the mark with water, mix
Uniform, 1mL solution containing 100μg tellurium.
1.3.12 tellurium standard solution. Pipette 2.00mL tellurium standard stock solution (1.3.11) in 200mL volumetric flask, was added 80mL of hydrochloric acid
(1.3.3), diluted with water to volume, and mix. This solution 1mL containing 1μg tellurium.
1.4 Instrument
1.4.1 hydride generation - atomic fluorescence spectrometer, with a high intensity selenium, tellurium hollow cathode lamp.
1.4.2 The following indicators were in optimum working conditions, who can be used to achieve.
--- Detection limit. not more than 2 × 10-9g/mL.
--- Precision. selenium, tellurium standard solution measuring 10 times the fluorescence intensity 0.02μg/mL, the standard deviation should not exceed the average fluorescence
5.0% strength.
1.5 Sample
Sample processed into crumb-like.
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