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GB/T 20975.19-2020: Methods for chemical analysis of aluminium and aluminium alloys - Part 19: Determination of zirconium content
Status: Valid GB/T 20975.19: Evolution and historical versions
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Methods for chemical analysis of aluminium and aluminium alloys - Part 19: Determination of zirconium content
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GB/T 20975.19-2020
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| GB/T 20975.19-2008 | English | 359 |
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Methods for chemical analysis of aluminium and aluminium alloys -- Part 19: Determination of zirconium content
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GB/T 20975.19-2008
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Basic data | Standard ID | GB/T 20975.19-2020 (GB/T20975.19-2020) | | Description (Translated English) | Methods for chemical analysis of aluminium and aluminium alloys - Part 19: Determination of zirconium content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H12 | | Classification of International Standard | 77.120.10 | | Word Count Estimation | 10,161 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-10-01 | | Older Standard (superseded by this standard) | GB/T 20975.19-2008 | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 20975.19-2020: Methods for chemical analysis of aluminium and aluminium alloys - Part 19: Determination of zirconium content
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Methods for chemical analysis of aluminium and aluminium alloys-Part 19.Determination of zirconium content
ICS 77.120.10
H12
National Standards of People's Republic of China
Replace GB/T 20975.19-2008
Chemical analysis methods of aluminum and aluminum alloys
Part 19.Determination of Zirconium Content
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 19 of GB/T 20975.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
This section replaces GB/T 20975.19-2008 "Methods for Chemical Analysis of Aluminum and Aluminum Alloy Part 19.Determination of Zirconium Content". versus
Compared with GB/T 20975.19-2008, in addition to editorial changes, the main technical changes are as follows.
---Added standard use safety warning;
---Modified the determination range of the xylenol orange spectrophotometric method from 0.040%~0.50% to 0.010%~1.00% (see section
Chapter 1, Chapter 1 of the.2008 edition);
--- Added "Normative Reference Documents" (see Chapter 2);
--- Added "Terms and Definitions" (see Chapter 3);
---Added requirements for reagents and water used in analysis (see 4.2 and 5.2);
---Modified the precision of the xylenol orange spectrophotometric method (see 4.7, Chapter 8 of the.2008 edition);
--- Deleted the "arsenazo Ⅲ spectrophotometric method" (see the.2008 edition of the method arsenazo Ⅲ spectrophotometric method);
--- Added "Na2EDTA Titration" (see Chapter 5);
--- Added "Test Report" (see Chapter 6).
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 Metals Research Institute Co., Ltd., Guangdong Industrial Analysis and Testing Center, Nonferrous Metals Technology
Economic Research Institute, Northeast Light Alloy Co., Ltd., Changsha Research Institute of Mining and Metallurgy Co., Ltd., Guizhou Research Institute of Analysis and Testing, Chinalco Mining
Co., Ltd., Liaoning Zhongwang Group Co., Ltd., Hebei Sitong New Metal Materials Co., Ltd., Shandongnanshan Aluminum Co., Ltd.,
Shandong Yankuang Light Alloy Co., Ltd., Youyan Yijin New Material Co., Ltd.
The main drafters of this section. Peng Zhan, Zhao Lin, Zhang Yongjin, Huang Puying, Xi Huan, Zhou Bing, Yu Xing, Yuan Xiao, Ai Zhen, Qu Fengjiao, Kuang Yuyun,
Liu Yanhua, Liu Chaofang, Cao Yanwei, Wang Ren, Li Wei, He Wenxiu.
The previous versions of the standards replaced by this part are as follows.
---GB/T 6987.19-1986, GB/T 6987.19-2001;
---GB/T 20975.19-2008.
Chemical analysis methods of aluminum and aluminum alloys
Part 19.Determination of Zirconium Content
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 xylenol orange spectrophotometric method and Na2EDTA titration method for the determination of zirconium in aluminum and aluminum alloys
content.
This section applies to the arbitration determination of zirconium content in aluminum and aluminum alloys. Xylenol orange spectrophotometric determination range. 0.010%~
1.00%; Na2EDTA titration method determination range. 2.50%~18.00%.
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 Xylenol orange spectrophotometry
4.1 Method summary
The sample is dissolved in hydrochloric acid and hydrogen peroxide, in the perchloric acid medium, after adding xylenol orange for color development, the wavelength is 535.0nm in the spectrophotometer
At the place, measure its absorbance to determine the zirconium content.
4.2 Reagents
Unless otherwise stated, only reagents and laboratory secondary water confirmed to be analytically pure are used in the analysis.
4.2.1 Pure aluminum (wAl≥99.99%, wZr≤0.0010%).
4.2.2 Hydrochloric acid (ρ=1.19g/mL).
4.2.3 Hydrogen peroxide (ρ=1.10g/mL).
4.2.4 Hydrochloric acid (11).
4.2.5 Perchloric acid [c(HClO4)=6.5mol/L]. Pipette 275mL perchloric acid (70.0%~72.0%), dilute with water to 500mL,
Mix well (calibrate if necessary).
4.2.6 Xylenol orange solution (1g/L), stored in a brown bottle, filtered if necessary.
4.2.7 Mandelic acid solution (150g/L), use after filtration.
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