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GB/T 5121.25-2008: Methods for chemical analysis of copper and copper alloys -- Part 25: Determination of boron content
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| GB/T 5121.25-2008 | English | 139 |
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Methods for chemical analysis of copper and copper alloys -- Part 25: Determination of boron content
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GB/T 5121.25-2008
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Basic data | Standard ID | GB/T 5121.25-2008 (GB/T5121.25-2008) | | Description (Translated English) | Methods for chemical analysis of copper and copper alloys -- Part 25: Determination of boron content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.30 | | Word Count Estimation | 6,612 | | Date of Issue | 2008-06-17 | | Date of Implementation | 2008-12-01 | | 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 of boron content. This section applies to the determination of copper and copper alloy of boron content. Measurement range: 0. 0010% to 0. 025%. | GB/T 5121.25-2008: Methods for chemical analysis of copper and copper alloys -- Part 25: Determination of boron content
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Methods for chemical analysis of copper and copper alloys Part 25. Determination of boron content
ICS 77.120.30
H13
National Standards of People's Republic of China
Copper and copper alloys -
Part 25. Determination of boron 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 25 sections.
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 Institute of Standards Metrology and Quality is responsible
Drafted.
This section is copper and aluminum materials Co., Ltd. Changsha drafted.
This section is non-ferrous metal processing plant in Shenyang, Shanghai Shen Jiang Xin Copper Co., Ltd., Guangzhou Nonferrous Metal Research Institute, Chinalco Luoyang Copper has
Limited participated in the drafting.
The main drafters of this section. Dengchu Ping, Zhou Kui, Li Hongbin, Huang Xinghua, Chen Bo, Zhang Hao, Li Wei, Yi Ming Chi, Xiong Xuefeng.
This part certifier. Lake Ping, Dai Fengying, Yue Wei, Zhang Min, Lin Shan.
Copper and copper alloys -
Part 25. Determination of boron content
1 Scope
This section specifies the determination of copper and copper alloy of boron content.
This section applies to the determination of copper and copper alloy of boron. Measurement range. 0.0010% to 0.025%.
2 principle of the method
The sample compound was dissolved in hydrochloric acid, nitric acid, phosphoric acid, sulfuric acid decomposition of boron in acetic acid - ammonium acetate buffer medium, boric acid and curcumin shape
A colored compound, measuring the absorbance at a wavelength at 540nm.
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 copper (Cu mass fraction ≥99.99%, boron content < 0.0001%).
3.2 sulfate (ρ1.84g/mL) pure class distinctions.
3.3 phosphate (ρ1.71g/mL) pure class distinctions.
3.4 nitrate (ρ1.40g/mL) pure class distinctions.
3.5 hydrochloric acid (ρ1.19g/mL) pure class distinctions.
3.6 acetic acid (ρ1.05g/mL) pure class distinctions.
3.7 acetic acid - sulfuric acid mixed acid. water cooling, stirring sulfuric acid (3.2) slowly into an equal volume of acetic acid (3.6) in.
3.8 acetic acid - ammonium acetate buffer solution. Weigh 225g of ammonium acetate was dissolved in 400mL of water, 300mL of acetic acid (3.6), the solution was applied
Polypropylene filter to 1000mL volumetric flask, dilute with water to volume, and mix.
3.9 sodium fluoride solution (40g/L). Store in a polypropylene bottle.
3.10 curcumin acetic acid solution (1.5g/L). Weigh 0.15g of curcumin {[CH3O (OH) C6H3CH = CHCO] 2CH2} in polypropylene
Ene or quartz vessel, add 60mL of acetic acid (3.6) and mix. At 40 ℃ water bath, stirring constantly. After complete dissolution, cool, and transferred
In 100mL polypropylene volumetric flask, dilute to the mark with acetic acid, and mix.
3.11 boron standard stock solution. Weigh 0.2860g of boric acid (excellent pure), in the 250mL beaker, add about 200mL water dissolve. will
Solution into 500 mL volumetric flask, dilute to the mark, shake. Store in a polypropylene bottle. This solution containing 1 mL
0.100mg boron.
3.12 boron standard solution. Pipette 25.00mL boron standard stock solution (3.11) in 500mL volumetric flask, dilute to the mark, mix
uniform. Store in a polypropylene bottle, this solution 1mL containing 5.0μg of boron. The time is now equipped with.
4 Instrument
4.1 Spectrophotometer.
4.2 polypropylene or quartz containers, containers with acetic acid (3.6) after rinsed, washed with water and dried.
5 Sample
Thickness of less than 1mm debris.
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