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GB/T 5121.19-2008: Methods for chemical analysis of copper and copper alloys -- Part 19: Determination of silver content
Status: Valid GB/T 5121.19: Evolution and historical versions
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| GB/T 5121.19-2008 | English | 189 |
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Methods for chemical analysis of copper and copper alloys -- Part 19: Determination of silver content
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GB/T 5121.19-2008
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| GB/T 5121.19-1996 | English | 199 |
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Copper and copper alloys--Determination of silver content
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GB/T 5121.19-1996
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Basic data | Standard ID | GB/T 5121.19-2008 (GB/T5121.19-2008) | | Description (Translated English) | Methods for chemical analysis of copper and copper alloys -- Part 19: Determination of silver content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.30 | | Word Count Estimation | 8,823 | | Date of Issue | 2008-06-17 | | Date of Implementation | 2008-12-01 | | Older Standard (superseded by this standard) | GB/T 5121.19-1996; GB/T 13293.12-1991 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.10 (Total No.123) | |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 alloys in silver content. This section applies to the determination of copper and copper alloys in silver content. Measuring range: 0. 002% to 1. 50%. | GB/T 5121.19-2008: Methods for chemical analysis of copper and copper alloys -- Part 19: Determination of silver content
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Methods for chemical analysis of copper and copper alloys Part 19. Determination of silver content
ICS 77.120.30
H13
National Standards of People's Republic of China
Replacing GB/T 5121.19-1996, GB/T 13293.12-1991
Copper and copper alloys -
Part 19. Determination of silver 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.
This is Part 19.
This Part replaces GB/T 5121.19-1996 "Copper and copper alloys - Determination of silver content" and GB/T 13293.12-
1991 "Methods for chemical analysis of high purity copper cathode sulfhydryl cotton fiber separation - Determination of silver content by flame atomic absorption spectrometry."
This portion of the GB/T 5121.19-1996 and GB/T 13293.12-1991 compared to the main changes are as follows.
--- Omitted "reference standard" one;
--- The GB/T 13293.12-1991 analysis upper and GB/T 5121.19-1996 analysis limit has been convergence, we will analyze the Fan
Capped by around 0.15% 1.50% Extended;
--- Original standard text format has been revised;
--- Increasing the precision and quality assurance and control provisions.
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.
This section Chinalco Luoyang Copper Co., Ltd., Beijing General Research Institute of Mining and Metallurgy drafted.
This part by the Beijing Nonferrous Metal Research Institute participated in the drafting.
The main drafters of this section. high Yu Feng advanced, Liu superfluous, seeking Tao Jiang, Yang Haidong.
This part certifier. new Zhang Ying, Zhang Li.
This part of the standard replaces the previous editions are.
--- GB/T 5121.19-1996, GB/T 13293.12-1991.
Copper and copper alloys -
Part 19. Determination of silver content
1 Scope
This section specifies the determination of copper and copper alloys in silver content.
This section applies to the determination of copper and copper alloys in silver content. Measurement range. 0.0002% to 1.50%.
2 principle of the method
Sample was dissolved in nitric acid. If the silver content is less than 0.005%, in Ba (HNO3) = 0.8mol/L medium with sulfhydryl cotton fiber
Adsorption of silver and copper separation matrix, eluted with ammonium thiocyanate silver. Using air - acetylene flame atomic absorption spectrometer at a wavelength of 328.1nm,
Measuring the absorbance of silver.
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 nitrate (ρ1.42g/mL) pure class distinctions.
3.2 hydrochloric acid (ρ1.18g/mL) pure class distinctions.
3.3 nitric acid (1 + 1).
3.4 nitrate [Ba (HNO3) = 0.8mol/L].
3.5 ammonium thiocyanate solution [Ba (NH4SCN) = 0.5mol/L].
3.6 copper solution (10g/L). Weigh 5.000g of pure copper (mass fraction of copper ≥99.99%, silver content is not more than 0.0005%)
Placed in 500mL beaker, add 40mL of nitric acid (3.1), dissolved by heating, removal of nitrogen oxides was boiled and cooled. Moved 500mL Capacity
Dilution bottle with water to volume, and mix.
3.7 silver standard stock solution. Weigh 1.0000g Silver (mass fraction of silver ≥99.95%) placed in 150mL beaker, add 10mL
Nitric acid (3.1), dissolved by heating, removal of nitrogen oxides was boiled and cooled. Moved into 1000mL volumetric flask, dilute with water to volume, and mix.
1mL solution containing 1mg silver.
Standard 3.8 Silver Solution A. Pipette 20.00mL standard silver stock solution (3.7) was placed in 500mL volumetric flask, 10mL of nitric acid was added
(3.1), dilute to the mark and mix. This solution 1mL containing 40μg silver.
3.9 Silver standard solution B. Pipette 5.00mL standard silver stock solution (3.7) was placed in 500mL volumetric flask, 50mL of nitric acid was added
(3.3), dilute with water to volume, and mix. This solution 1mL containing 10μg silver.
3.10 sulfhydryl cotton. Take 20mL thioglycolic acid (ρ1.32g/mL) 14mL and acetic anhydride (ρ1.08g/mL) placed in 250mL grinding mouth
Bottle, mix, add two drops of sulfuric acid (ρ1.84g/mL), mix well, cool. 4g of cotton wool soaked it all, capped at
24h Place about 25 ℃. Remove squeezed, washed with water until the washings were neutral, squeezed and placed in an oven at 37 ℃ ~ 38 ℃ drying (about 9h).
After cooling placed in a brown bottle grinding mouth, in a desiccator stored.
4 instruments and devices
4.1 Instrument
4.1.1 flame atomic absorption spectrometer. a silver hollow-cathode lamp.
4.1.2 The following indicators were in optimum working conditions, who can be used to achieve
--- Sensitivity. the substrate solution consistent with the measurement solution, features silver concentration should not exceed 0.03μg/mL;
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