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GB/T 20975.33-2020: Methods for chemical analysis of aluminium and aluminium alloys - Part 33: Determination of potassium content - Flame atomic absorption spectrometric method
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Methods for chemical analysis of aluminium and aluminium alloys - Part 33: Determination of potassium content - Flame atomic absorption spectrometric method
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GB/T 20975.33-2020
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Basic data | Standard ID | GB/T 20975.33-2020 (GB/T20975.33-2020) | | Description (Translated English) | Methods for chemical analysis of aluminium and aluminium alloys - Part 33: Determination of potassium content - Flame atomic absorption spectrometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H12 | | Classification of International Standard | 77.120.10 | | Word Count Estimation | 6,645 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-10-01 | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 20975.33-2020: Methods for chemical analysis of aluminium and aluminium alloys - Part 33: Determination of potassium content - Flame atomic absorption spectrometric method
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Methods for chemical analysis of aluminium and aluminium alloys-Part 33.Determination of potassium content-Flame atomic absorption spectrometric method
ICS 77.120.10
H12
National Standards of People's Republic of China
Chemical analysis methods of aluminum and aluminum alloys
Part 33.Determination of potassium content
Flame atomic absorption spectrometry
2020-11-19 released
2021-10-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
GB/T 20975 "Methods for Chemical Analysis of Aluminum and Aluminum Alloys" is divided into 37 parts.
---Part 1.Determination of mercury content;
---Part 2.Determination of arsenic content;
---Part 3.Determination of copper content;
---Part 4.Determination of iron content;
---Part 5.Determination of silicon content;
---Part 6.Determination of cadmium content;
---Part 7.Determination of manganese content;
---Part 8.Determination of zinc content;
---Part 9.Determination of lithium content by flame atomic absorption spectrometry;
---Part 10.Determination of tin content;
---Part 11.Determination of lead content;
---Part 12.Determination of titanium content;
---Part 13.Determination of vanadium content;
---Part 14.Determination of nickel content;
---Part 15.Determination of boron content;
---Part 16.Determination of magnesium content;
---Part 17.Determination of strontium content;
---Part 18.Determination of Chromium Content;
---Part 19.Determination of Zirconium Content;
---Part 20.Determination of Gallium Content Butyl Rhodamine B Spectrophotometry;
---Part 21.Determination of calcium content;
---Part 22.Determination of beryllium content;
---Part 23.Determination of antimony content;
---Part 24.Determination of total rare earth content;
---Part 25.Determination of element content by inductively coupled plasma atomic emission spectrometry;
---Part 26.Determination of carbon content by infrared absorption method;
---Part 27.Determination of cerium, lanthanum and scandium content by inductively coupled plasma atomic emission spectrometry;
---Part 28.Determination of cobalt content by flame atomic absorption spectrometry;
---Part 29.Determination of molybdenum content thiocyanate spectrophotometric method;
---Part 30.Determination of hydrogen content by heating extraction thermal conductivity method;
---Part 31.Determination of phosphorus content molybdenum blue spectrophotometry;
---Part 32.Determination of Bismuth Content;
---Part 33.Determination of potassium content by flame atomic absorption spectrometry;
---Part 34.Determination of sodium content by flame atomic absorption spectrometry;
---Part 35.Determination of Tungsten Content Thiocyanate Spectrophotometric Method;
---Part 36.Determination of silver content by flame atomic absorption spectrometry;
--- Part 37.Determination of Niobium Content.
This part is part 33 of GB/T 20975.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
This part was proposed by China Nonferrous Metals Industry Association.
This part is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243).
Drafting organizations of this section. Chinalco Zhengzhou Nonferrous Metal Research Institute Co., Ltd., Nonferrous Metal Technology and Economic Research Institute, Northeast Light Alloy Co., Ltd.
Liability Company, Guizhou Institute of Analysis and Testing, Changsha Research Institute of Mining and Metallurgy Co., Ltd., China Aluminum Materials Application Research Institute Co., Ltd., China Aluminum
Shanxi New Materials Co., Ltd., Beikuang Testing Technology Co., Ltd., Xi'an Hantang Analysis and Testing Co., Ltd., Kunming Metallurgical Research Institute, Shandong Yankuang
Light Alloy Co., Ltd., Shenzhen Zhongjin Lingnan Nonferrous Metals Co., Ltd. Shaoguan Smelter, Inner Mongolia Huomei Hongjun Aluminum & Power Co., Ltd.
the company.
The main drafters of this section. Shi Lei, Xi Huan, Zhou Bing, Yang Hongbo, Yi Jia, Zhang Yingying, He Minglan, Cui Junfeng, Xue Ning, Sun Jixian, Yang Wei,
Liu Leilei, Wang Peng, Zuo Hongyi, Cang Xianghui, Wei Yuanyuan, Zhou Shiyang, Yang Binghong, Han Zhengqian.
Chemical analysis methods of aluminum and aluminum alloys
Part 33.Determination of potassium content
Flame atomic absorption spectrometry
Warning---The personnel using this section should have practical experience in formal laboratory work. This section does not point out all possible safety issues
question. The user is responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated by relevant national laws and regulations.
1 Scope
This part of GB/T 20975 specifies the flame atomic absorption spectrometry to determine the potassium content in aluminum and aluminum alloys.
This section applies to the arbitration determination of potassium content in aluminum and aluminum alloys. Measuring range. 0.0010%~1.00%.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 8005.2 Terminology of Aluminum and Aluminum Alloy Part 2.Chemical Analysis
GB/T 8170-2008 Numerical rounding rules and the expression and determination of limit values
3 Terms and definitions
The terms and definitions defined in GB/T 8005.2 apply to this document.
4 Method summary
The sample is dissolved in hydrochloric acid and hydrogen peroxide, cesium chloride is added as an ionization inhibitor, and an air-acetylene flame is used in the flame atomic absorption spectrometry
At the wavelength of 766.5nm, the absorbance of potassium is measured to determine the potassium content.
5 Reagents
Unless otherwise specified, only reagents and laboratory grade water confirmed to be pure superior grade are used in the analysis.
5.1 Pure aluminum (wAl≥99.99%, wK≤0.0005%).
5.2 Hydrogen peroxide (ρ=1.10g/mL).
5.3 Hydrochloric acid (11) (prepared with high-purity reagent BVⅢ grade hydrochloric acid).
5.4 Cesium chloride solution (25g/L). Weigh 2.5g of cesium chloride (spectrally pure), dissolve it in 100mL of water, and mix.
5.5 Aluminum solution (20mg/mL). Weigh 20.000g pure aluminum (5.1) in a 500mL PTFE beaker, cover with a watch glass, and add
Into the total amount of 600mL hydrochloric acid (5.3), slowly heat until completely dissolved, and cool. Transfer the solution into a 1000mL volumetric flask and dilute with water to
Scale and mix well.
5.6 Potassium standard storage solution. Weigh 1.9068g reference potassium chloride (preliminarily burned at 450℃~500℃ for 1.5h~2h and put it in a desiccator
Cooled to room temperature) dissolved in a 300mL beaker, transferred to a 1000mL volumetric flask, diluted to the mark with water, and mixed. Store in dry
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