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GB/T 5121.16-2008: Methods for chemical analysis of copper and copper alloys -- Part 16: Determination of chromium content
Status: Valid GB/T 5121.16: Evolution and historical versions
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Methods for chemical analysis of copper and copper alloys -- Part 16: Determination of chromium content
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GB/T 5121.16-2008
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| GB/T 5121.16-1996 | English | 239 |
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Copper and copper alloys--Determination of chromium content
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GB/T 5121.16-1996
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Basic data | Standard ID | GB/T 5121.16-2008 (GB/T5121.16-2008) | | Description (Translated English) | Methods for chemical analysis of copper and copper alloys -- Part 16: Determination of chromium content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.30 | | Word Count Estimation | 13,130 | | Date of Issue | 2008-06-17 | | Date of Implementation | 2008-12-01 | | Older Standard (superseded by this standard) | GB/T 5121.16-1996; GB/T 13293.3-1991 | | Adopted Standard | ISO 6437-1984, MOD; ISO 4744-1984, MOD | | Regulation (derived from) | National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 chromium content. This method is suitable for the determination of copper and copper alloy chromium content. Measuring range: 0. 00005% to 0. 0010%. Method 2 flame atomic absorption spectrometry method provides for the determination of copper and copper alloy chromium content. This method is suitable for the determination of copper and copper alloy chromium content. Measuring range: 0. 050% to 1. 30%. The total chromium alloy chromium content-Determination of copper in the international standards set out by titration Titration Method 3 This method requirements. This method is suitable for the chromium content of 0. 10% to 2. 0% of the product. | GB/T 5121.16-2008: Methods for chemical analysis of copper and copper alloys -- Part 16: Determination of chromium content
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Methods for chemical analysis of copper and copper alloys Part 16. Determination of chromium content
ICS 77.120.30
H13
National Standards of People's Republic of China
Replacing GB/T 5121.16-1996
Partially replace GB/T 13293.3-1991
Copper and copper alloys -
Part 16. Determination of chromium content
(ISO 6437. 1984, ISO 4744. 1984, Copperaloysandcopperaloys-
Determinationofchromiumcontent, MOD)
Posted 2008-12-01 2008-06-17 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.
This is Part 16.
This section includes a method, second method, Method three. Chromium mass fraction of 0.10% to 1.30%, arbitration recommended method II.
This section Method Three identical with ISO 6437. 1984 "Determination of the amount of chromium copper alloys --- --- titration", compared with the international standard for
The following editorial changes.
--- With a decimal point instead of a comma as the decimal point in the international standard ",". ",";
--- Use the "method" instead of "this International Standard";
--- Revised international standard-Africa legal units of measurement;
--- The formula, reg number, table number to re-annotate;
--- Remove the cover of the international standards, directory, foreword and introduction.
The second method to modify the part using ISO 4744. 1984 "Determination of copper alloys --- --- chromium content by flame atomic absorption spectrometry" in
The main technical content of ISO 4744. 1984 the same structure does not correspond exactly to write. Specific technical difference in Appendix A, Appendix B.
This Part replaces GB/T 5121.16-1996 "Copper and copper alloys - Determination of chromium content" and GB/T 13293.3-
1991 "Methods for chemical analysis of high purity copper cathode Zeeman effect electrothermal atomic absorption spectrometric method for the determination of chromium, manganese and cadmium."
This portion of the GB/T 13293.3-1991, GB/T 5121.16-1996 compared to the main changes are as follows.
--- Second method is GB/T 5121.16-1996 amendments, supplements the provisions of quality assurance and control, increasing the precision of the terms;
--- One method of GB/T 13293.3-1991 amendment complements the quality assurance and control provisions, increasing the precision of the terms;
--- Adds three. the equivalent international standard ISO 6437. 1984 "copper alloy chromium content was measured --- --- titration."
This section in Appendix A, Appendix B is an informative annex.
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 method in this section by the Jiangxi Copper Group Co., Ltd., Jinchuan Group Co., Ltd. participated in the drafting.
The main drafters of this section a method. advanced Feng, Yu Feng Qing, high dielectric level, Yangsu Zhi.
The main part of a method of verification of people. Percentage light cents, Shen Guang Xin, Zhao Quanmin, Li first super.
This section was drafted by the Northwest Gansu Method two copper limited liability company.
This section Method Two Chinalco Shenyang Nonferrous Metals Processing Co., Ltd., Chinalco Luoyang Copper Co., Ltd. participated in the drafting.
Method Two main drafters of this section. Zhao Yi, Yang Yonggang.
This section Method two main certifier. Sun Aiping, Zhang Xing, Liu Xia, Liu Xia.
This section Method three Chinalco Luoyang Copper Co., Ltd., Beijing General Research Institute of Mining and Metallurgy, China Nonferrous Metals Industry standard quality research metrology
Drafted.
Method three main drafters of this section. Zhang Jinghua, Lihua Chang, Yang Lijuan.
The method in this section are three main certifier. Fu Bin, Xia Qing beads.
This part of the standard replaces the previous editions are.
--- GB/T 5121.16-1996, GB/T 13293.3-1991.
Copper and copper alloys -
Part 16. Determination of chromium content
1 1 Zeeman effect electrothermal atomic absorption spectrometry
1.1 Scope
This method specifies the method for determination of copper and copper alloy chromium.
This method is applicable to the determination of copper and copper alloy chromium. Measurement range. 0.00005% to 0.0010%.
1.2 Principle of the method
Sample was dissolved in nitric acid, a volume of the test solution injected into the electrothermal atomizer with Zeeman effect atomic absorption spectrometer
357.9nm wavelength measuring the absorbance of chromium, chromium mass fraction calculated by working curve method.
1.3 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. experiment
The utensils were soaked 12h, washed thoroughly with water and nitric acid (1.3.3).
1.3.1 Copper (mass fraction of copper ≥99.99%, mass fraction of iron < 0.00005%).
1.3.2 nitric acid (1 + 1).
1.3.3 nitric acid (1 + 19).
1.3.4 copper substrate solution (100g/L). Weigh 20.00g copper (1.3.1) into 400mL beaker was added in 160mL nitric acid
(1.3.2), Leng Rong. After the reaction was stopped by intense, low heat until completely dissolved, oxides of nitrogen purge boiling, cooled to room temperature. Moved
200mL volumetric flask, dilute with water to volume, and mix.
1.3.5 Chromium standard stock solution. Weigh 0.2829g potassium dichromate (reference reagent) dissolved in water and transferred to 500mL volumetric flask with water
Dilute to volume, and mix. This solution 1mL containing 200μg chromium.
1.3.6 Chromium Standard Solution A. Pipette 10.00mL chromium standard stock solution (1.3.5) in 500mL flask, diluted with water to the mark,
Mix well. 1mL solution containing 4μg chromium.
1.3.7 Chromium standard solution B. Pipette 10.00mL chromium standard solution A (1.3.6) in 100mL volumetric flask, dilute to the mark with water, mix
uniform. This solution 1mL containing 0.4μg chromium.
1.4 Instrument
1.4.1 graphite furnace atomic absorption spectrometer. with electrothermal atomizer, micro sampler or autosampler, chromium hollow cathode lamp and Zeeman effect
Background correction shall devices.
1.4.2 The graphite furnace atomic absorption spectrometer should meet the following specifications.
--- Lowest sensitivity. curve used in the arithmetic series of standard solution of greatest concentration, absorbance should not be less than 0.300.
--- Correlation coefficient curve is not less than 0.995.
--- Low precision requirements. the highest concentration of standard solution, the absorbance measured 10 times, calculate the mean and standard deviation. The standard
Standard deviation should not exceed 1.5% of the average absorbance. The lowest concentration of standard solutions (not zero concentration standard solution
Solution), 10 times the absorbance measured, calculating the standard deviation. The standard deviation should not exceed the average absorbance of the highest concentration of the standard
0.5% of the value.
1.5 Sample
Sample processed into crumb-like.
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