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GB/T 5121.7-2008: Methods for chemical analysis of copper and copper alloys -- Part 7: Determination of arsenic content
Status: Valid GB/T 5121.7: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 5121.7-2008 | English | 279 |
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Methods for chemical analysis of copper and copper alloys -- Part 7: Determination of arsenic content
| Valid |
GB/T 5121.7-2008
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| GB/T 5121.7-1996 | English | 239 |
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Copper and copper alloys--Determination of arsenic content
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GB/T 5121.7-1996
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| GB/T 5121.7-1985 | English | RFQ |
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Methods for chemical analysis of copper--The silver diethyldithiocarbamate photometric method for the determination of arsenic content
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GB/T 5121.7-1985
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PDF similar to GB/T 5121.7-2008
Basic data | Standard ID | GB/T 5121.7-2008 (GB/T5121.7-2008) | | Description (Translated English) | Methods for chemical analysis of copper and copper alloys -- Part 7: Determination of arsenic content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.30 | | Word Count Estimation | 12,181 | | Date of Issue | 2008-06-17 | | Date of Implementation | 2008-12-01 | | Older Standard (superseded by this standard) | GB/T 5121.7-1996; GB/T 13293.5-1991 | | Adopted Standard | ISO 3220-1975, MOD | | Regulation (derived from) | National Standard Approval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 alloys arsenic content. This method is suitable for the determination of copper and copper alloy arsenic content. Measuring range: 0. 00005% to 0. 0010%. Method two molybdenum blue spectrophotometric method provides for the determination of copper and copper alloys arsenic content. This method is suitable for the determination of copper and copper alloy arsenic content. Measuring range: > 0. 0010% to 0. 10%. Method three spectrophotometric method provides for the spectrophotometric determination of copper and copper alloys arsenic. This method is applicable to the determination of the alloying elements arsenic or arsenic impurities in copper and copper alloys listed in the ISO international standard. | GB/T 5121.7-2008: Methods for chemical analysis of copper and copper alloys -- Part 7: Determination of arsenic content
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Methods for chemical analysis of copper and copper alloys Part 7. Determination of arsenic content
ICS 77.120.30
H13
National Standards of People's Republic of China
Replacing GB/T 5121.7-1996, GB/T 13293.5-1991
Copper and copper alloys -
Part 7. Determination of arsenic content
(ISO 3220. 1975, Copperandcopperaloys-
Determinationofarsenic-Photometricmethod, MOD)
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 7.
This section includes a method, second method, Method three.
This section Method Three identical with ISO 3220. 1975 "Copper and copper alloys --- --- spectrophotometric determination of the amount of arsenic," with international standards
Editorial changes made the following ratio.
--- 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.
This Part replaces GB/T 5121.7-1996 "Copper and copper alloys - Determination of arsenic content" and GB/T 13293.5-
1991 "Methods for chemical analysis of high purity copper cathode arsenic molybdenum heteropoly acid - crystal violet spectrophotometric determination of arsenic content."
This portion of the GB/T 5121.7-1996, GB/T 13293.5-1991 compared to the main changes are as follows.
--- One method of GB/T 13293.5-1991 amendments adopted "by Hydride Generation - Atomic Fluorescence Spectrometry" instead of the original
Standard "Arsenic molybdenum heteropoly acid - crystal violet spectrophotometric method";
--- Second method is GB/T 5121.7-1996 revision, complementing the quality assurance and control provisions, increasing the precision of the terms;
--- Adds three. the equivalent international standard ISO 3220. 1975 "Determination of copper and copper alloys --- --- spectrophotometry amount of arsenic."
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 by the JCC Guixi Smelter, Beijing General Research Institute of Mining and Metallurgy drafted.
A part of this method by the Tongling Nonferrous Metals Group Holdings Co., Ltd. participated in the drafting.
The main drafters of this section a method. the beam subsets, representing light cents Tangshu Fang, Yu Li, Lu Qiulan, Luo Zhi.
The main part of a method of verification by. Fan Zhanfang, high red waves.
This section Method Two Chinalco Shenyang Nonferrous Metals Processing Co. drafted.
This section Method Two Chinalco Luoyang Copper Co., copper northwest Gansu limited liability company participated in the drafting.
Method Two main drafters of this part. Sun Aiping, wide Jin Lee, Li Yamin.
This section Method two main certifier. Li Wei, Zhao Yi, Guochao Xia, Liu Jianming.
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 5121.7-1996, GB/T 13293.5-1991.
Copper and copper alloys -
Part 7. Determination of arsenic content
1 a method Hydride Generation - Atomic Fluorescence Spectrometry
1.1 Scope
This method specifies the method for determination of copper and copper alloy arsenic content.
This method is applicable to the determination of copper and copper alloy arsenic content measurement range. 0.00005% to 0.0010%.
1.2 Principle of the method
The sample is dissolved in nitric acid, with ammonia in the medium lanthanum hydroxide co-precipitation of arsenic and copper and the substrate separation, precipitation heat dissolved in hydrochloric acid. In the hydrogenation
Substance generator, arsenic is reduced to potassium borohydride as hydride with argon gas into the quartz furnace atomizer, the determination of arsenic on the atomic fluorescence spectrometer
The fluorescence intensity of the element.
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 nitric acid (1 + 1) pure class distinctions.
1.3.2 hydrochloric acid (ρ1.19g/mL) pure class distinctions.
1.3.3 hydrochloric acid (11 + 89).
1.3.4 ammonia (ρ0.90g/mL) BVⅢ level.
1.3.5 ammonia (5 + 95).
1.3.6 thiourea - ascorbic acid solution. Weigh 100g thiourea, 50g of ascorbic acid, dissolved in water and diluted to 1000mL, shake.
1.3.7 lanthanum nitrate solution (50g/L). Weigh 50g of lanthanum nitrate dissolved in water 1000mL, shake.
1.3.8 solution of potassium borohydride (15g/L). Weigh 15g of potassium borohydride dissolved containing potassium hydroxide (5g/L) aqueous solution of 1000mL, shake
uniform. Using now.
1.3.9 arsenic standard stock solution. Weigh 0.1320g in sulfuric acid desiccator to constant weight basis arsenic trioxide, dissolved in warm
1.2mL sodium hydroxide solution (100g/L), transferred to 1000mL volumetric flask, dilute to the mark. This solution 1mL containing 100μg arsenic.
1.3.10 arsenic standard solution. Pipette 2.00mL arsenic standard stock solution (1.3.9) in 200mL flask, add hydrochloric acid (1.3.2)
20mL, diluted with water to the mark. This solution 1mL containing 1μg of arsenic.
1.4 Instrument
1.4.1 atomic fluorescence spectrometer, with a high-intensity arsenic hollow cathode lamp.
1.4.2 Under optimum working conditions for those who reach the following indicators can be used.
--- Detection limit. not more than 2 × 10-9g/mL.
--- Precision. Arsenic standard solution measuring 10 times the fluorescence intensity 0.02μg/mL, the standard deviation should not exceed the average fluorescence intensity
5.0% degrees.
1.5 Sample
Sample processed into crumb-like.
1.6 Analysis Steps
1.6.1 Sample
Weigh 20.0g sample (1.5), accurate to 0.001g.
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