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Chemical analysis methods of aluminum hardeners. Part 12: Determination of copper content. Sulfur and sodium titration method
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Basic data | Standard ID | YS/T 807.12-2012 (YS/T807.12-2012) | | Description (Translated English) | Chemical analysis methods of aluminum hardeners. Part 12: Determination of copper content. Sulfur and sodium titration method | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H12 | | Classification of International Standard | 77.120.10 | | Word Count Estimation | 6,671 | | Regulation (derived from) | Ministry of Industry and Information Technology Bulletin 2012 No. 55; industry standard filing Notice 2013 No. 1 (Total No. 157); | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies the aluminum alloy with copper content determination. This standard applies to aluminum master alloys of copper content. Measuring range of 20. 0% ~ 70. 0%. | YS/T 807.12-2012: Chemical analysis methods of aluminum hardeners. Part 12: Determination of copper content. Sulfur and sodium titration method
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Chemical analysis methods of aluminum hardeners.Part 12. Determination of copper content.Sulfur and sodium titration method
ICS 77.120.10
H12
People's Republic of China Nonferrous Metals Industry Standard
Intermediate aluminum alloys -
Part 12. Determination of copper content
Sodium thiosulfate titration
Part 12. Determinationofcoppercontent-
Issued on. 2012-11-07
2013-03-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 807-2012 "aluminum master alloy chemical analysis method" is divided into 14 parts.
--- Part 1. Determination of iron content dichromate method;
--- Part 2. Determination of manganese content Potassium periodate spectrophotometric method;
--- Part 3. Determination of nickel by titration with EDTA;
--- Part 4. Determination of chromium content ammonium ferrous sulfate titration;
--- Part 5. Determination of zirconium content EDTA titration;
--- Part 6. Determination of boron ion selective electrode method;
--- Part 7. Determination of beryllium content Eriochrome cyanide blue R spectrophotometry;
--- Part 8. Determination of antimony content Potassium iodide spectrophotometry;
--- Part 9. Determination of bismuth content of potassium iodide spectrophotometry;
--- Part 10. Determination of potassium content by flame atomic absorption spectrometry;
--- Part 11. Determination of sodium content by flame atomic absorption spectrometry;
--- Part 12. Determination of copper content of sodium thiosulfate titration;
--- Part 13. Determination of vanadium content ammonium ferrous sulfate titration;
--- Part 14. Determination of strontium EDTA titration.
This section YS/T Part 12 807.
This section drafted in accordance with GB/T 1.1-2009 given rules.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is responsible for drafting units. Aluminum Corporation of China Zhengzhou Research Institute, China Nonferrous Metals Industry Quality Standards and Metrology Institute
The study.
Participated in the drafting of this section. Neimengguhuo coal Hongjunlvdian limited liability company, Guangzhou Nonferrous Metal Research Institute, Zhengzhou City around Alcoa
Ltd., Shandong Yankuang Light Alloy Co., Ltd.
The main drafters of this section. Li Zhihui, Zhang Yan, Yao Yongfeng, Daifeng Ying, Gao Zhiyong, Wei Yanqin, Xiaoling, Yang Jianwen, hole Korea.
Intermediate aluminum alloys -
Part 12. Determination of copper content
Sodium thiosulfate titration
Warning. Use of this standard shall have a person experiences regular laboratory work. This standard does not point out all possible security issues.
Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
This section YS/T 807 specifies the method for determination of aluminum alloy with copper content.
This section applies to the determination of the intermediate aluminum alloy of copper content. Determination of the range of 20.0% ~ 70.0%.
2 Method summary
Sample decomposition with hydrochloric acid, nitric acid. In the presence of fluoride, sulfuric acid and nitric acid rid of silicon and hydrogen fluoride is at a pH of 3.5 to 4.0
Ammonium solution, the copper (Ⅱ) reacts with potassium iodide and iodine precipitation equal molar solution titrated with sodium thiosulfate standard room
Then calculate the copper content.
3 Reagents
Unless otherwise indicated in the analysis using only the gifted class pure reagents and sub-boiling distilled water or potassium.
3.1 anhydrous sodium carbonate.
3.2 hydrochloride (11).
3.3 nitric acid (11).
3.4 sulfate (11).
3.5 sulfate (117).
3.6 Ammonium hydroxide (11).
3.7 Potassium thiocyanate (100g/L). Weigh 100g of potassium thiocyanate was dissolved in 800mL of water, diluted to 1000mL, if necessary, use the filter.
3.8 ammonium fluoride solution (200g/L). Weigh 200g ammonium hydrogen fluoride (excellent pure) was dissolved in 800mL of water, dissolved in 60 ℃ water bath,
Diluted to 1000mL, stored in polyethylene bottles.
Note. To use when called to take and dissolution polytetrafluoroethylene container, does not affect the determination of the solution is cloudy.
3.9 potassium iodide solution (200g/L). Weigh 200g of potassium iodide was dissolved in 800mL water and diluted to 1000mL, placed in a brown reagent bottle
, The reservoir in the dark.
3.10 standard potassium dichromate solution [c (1/6K2Cr2O7) = 0.1000mol/L]. weigh 4.9030g baseline potassium dichromate (in advance
150 ℃ drying 2h and cooled to room temperature in a desiccator), placed in 300mL beaker, dissolved in water and transferred to 1000mL volumetric flask,
Dilute with water to volume, and mix.
3.11 standard sodium thiosulfate solution (0.1mol/L)
3.11.1 preparation. Weigh 25g sodium thiosulfate (Na2S2O3 · 5H2O) in 250mL beaker, 0.2g of anhydrous sodium carbonate, plus
The boiled cold distilled water, dissolved completely moved into 1000mL volumetric flask, boiled cold distilled water to dilute to the mark and mix. in
After leaving for a week in the dark calibration. If necessary after filtration calibration.
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