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GB/T 20975.21-2020 English PDF (GB/T 20975.21-2008)

GB/T 20975.21-2020_English: PDF (GB/T20975.21-2020)
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GB/T 20975.21-2020English189 Add to Cart 3 days [Need to translate] Methods for chemical analysis of aluminium and aluminium alloys -- Part 21: Determination of calcium content Valid GB/T 20975.21-2020
GB/T 20975.21-2008English239 Add to Cart 3 days [Need to translate] Methods for chemical analysis of aluminium and aluminium alloys -- Part 21: Determination of calcium content -- Flame atomic absorption spectrometric method Obsolete GB/T 20975.21-2008


BASIC DATA
Standard ID GB/T 20975.21-2020 (GB/T20975.21-2020)
Description (Translated English) Methods for chemical analysis of aluminium and aluminium alloys -- Part 21: Determination of calcium content
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H12
Classification of International Standard 77.120.10
Word Count Estimation 10,195
Date of Issue 2020-09-29
Date of Implementation 2021-08-01
Older Standard (superseded by this standard) GB/T 20975.21-2008
Drafting Organization National Standard (Beijing) Inspection and Certification Co., Ltd., Guangdong Industrial Analysis and Testing Center, Non-ferrous Metal Technology and Economic Research Institute, Beijing Non-ferrous Metals and Rare Earth Application Research Institute, Xi'an Hantang Analysis and Testing Co., Ltd., Guizhou Analysis and Testing Research Institute, North Mine Testing Technology Co., Ltd., Hebei Stone New Metal Materials Co., Ltd., Kunming Research Institute of Metallurgy, Changsha Research Institute of Mining and Metallurgy Co., Ltd., Chinalco Luoyang Copper Processing Co., Ltd., Guangdong Shaoguan Quality Metrology Supervision and Inspection Institute, Youyan Yijinxin Materials Co., Ltd., Northeast Light Alloy Co., Ltd.
Administrative Organization National Nonferrous Metal Standardization Technical Committee (SAC/TC 243)
Regulation (derived from) National Standard Announcement No. 20 of 2020
Proposing organization China Nonferrous Metals Industry Association
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration

BASIC DATA
Standard ID GB/T 20975.21-2008 (GB/T20975.21-2008)
Description (Translated English) Methods for chemical analysis of aluminium and aluminium alloys. Part 21: Determination of calcium 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 6,661
Date of Issue 2008-03-31
Date of Implementation 2008-09-01
Older Standard (superseded by this standard) GB/T 6987.21-2001
Drafting Organization Northeast Light Alloy Co., Ltd.
Administrative Organization National Standardization Technical Committee of non-ferrous metals
Regulation (derived from) Announcement of Newly Approved National Standards No. 5, 2008 (No. 118 overall)
Proposing organization China Nonferrous Metals Industry Association
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the aluminum and aluminum alloys Determination of calcium content. This section applies to aluminum and aluminum alloys Determination of calcium content. Measuring range: 0. 015 to 0. 30%.


GB/T 20975.21-2020 Methods for chemical analysis of aluminium and aluminium alloys - Part 21.Determination of calcium content ICS 77.120.10 H12 National Standards of People's Republic of China Replace GB/T 20975.21-2008 Chemical analysis methods of aluminum and aluminum alloys Part 21.determination of calcium content 2020-09-29 released 2021-08-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee Preface 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 spectrophotometric method; ---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 21 of GB/T 20975. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 20975.21-2008 "Methods for Chemical Analysis of Aluminum and Aluminum Alloys Part 21.Determination of Calcium Content Flame Compared with GB/T 20975.21-2008, Atomic Absorption Spectrometry, except for editorial changes, the main technical changes are as follows. --- Added standard use safety warning; ---Modified the measurement range of the method, from 0.01%~0.30% to 0.010%~1.00% (see Chapter 1,.2008 edition Chapter 1); ---Added normative reference documents (see Chapter 2); ---Added the requirements for reagents and water used in analysis (see 4.2); ---Modified the sample dissolution method, changed from alkali dissolution to acid dissolution (see 4.5.4.1,.2008 edition of 6.4.1); ---Modified the precision of atomic absorption spectrophotometry (see 4.7, Chapter 8 of the.2008 edition); --- Deleted "quality control and assurance" (see Chapter 9 of the.2008 edition); --- 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. National Standard (Beijing) Inspection and Certification Co., Ltd., Guangdong Industrial Analysis and Testing Center, Non-ferrous Metals Technology and Economic Research Institute Research Institute, Beijing Research Institute of Nonferrous Metals and Rare Earth Application, Xi'an Hantang Analysis and Testing Co., Ltd., Guizhou Analysis and Testing Research Institute, North Mine Testing Technology Co., Ltd., Hebei Stone New Metal Materials Co., Ltd., Kunming Metallurgical Research Institute, Changsha Research Institute of Mining and Metallurgy Co., Ltd., Chinalco Luoyang Copper Processing Co., Ltd., Guangdong Shaoguan City Quality Metrology Supervision and Inspection Institute, Youyan Yijin New Material Co., Ltd., Northeast Light Alloy Limited liability company. The main drafters of this section. Zhang Xiao, Xie Hui, Xi Huan, Liu Ying, Dong Chaobo, Xu Yue, Lei Zuwei, Yao Fang, Liu Leilei, Li Jiahua, Han Xiao, Wang Jinrong, Rong Xinge, Li Zishang, Li Shaowen, Yuan Qi, Liu Chaofang, Xiong Xiaoyan, Wang Ran, Wang Xue, Li Ying, Liu Weili, Yang Weiji, Chen Shaolong, Chen Jiwei, Guo Jun, Yang Yonggang, Pang Xin, Tong Jian, Zhou Bing. The previous versions of the standards replaced by this part are as follows. ---GB/T 6987.21-1986, GB/T 6987.21-2001; ---GB/T 20975.21-2008. Chemical analysis methods of aluminum and aluminum alloys Part 21.determination of calcium 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 use of flame atomic absorption spectrometry and Na2EDTA titration to determine calcium in aluminum and aluminum alloys content. This section applies to the arbitration determination of calcium content in aluminum and aluminum alloys. Flame atomic absorption spectrometry measurement range. 0.010%~ 1.00%; Na2EDTA titration method determination range. 4.00%~30.00%. 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 Flame atomic absorption spectrometry 4.1 Method summary The sample is decomposed with hydrochloric acid and hydrogen peroxide. In the hydrochloric acid medium, the lanthanum salt is used as the release agent, and 8-hydroxyquinoline is used as the protective agent. At the wavelength of 422.7nm of the spectrometer, using an air-acetylene-enriched flame, measure the absorbance of calcium and calculate its content. 4.2 Reagents Unless otherwise stated, only reagents and laboratory secondary water confirmed to be pure superior grade are used in the analysis. 4.2.1 Pure aluminum (wAl≥99.99%, wCa≤0.001%). 4.2.2 Hydrochloric acid (ρ=1.19g/mL). 4.2.3 Nitric acid (ρ=1.42g/mL). 4.2.4 Hydrofluoric acid (ρ=1.14g/mL). 4.2.5 Hydrogen peroxide (ρ=1.10g/mL). 4.2.6 Sulfuric acid (ρ=1.83g/mL). 4.2.7 Hydrochloric acid (11). 4.2.8 Lanthanum salt solution (50g/L). Weigh 25g lanthanum oxide (wCa≤0.001%), place it in a.200mL beaker, and add 40mL hydrochloric acid ......


GB/T 20975.21-2008 Methods for chemical analysis of aluminium and aluminium alloys Part 21. Determination of calcium content Flame atomic absorption spectrometric method ICS 77.120.10 H12 National Standards of People's Republic of China Replacing GB/T 6987.21-2001 Methods for chemical analysis of aluminum and aluminum alloys Part 21. Determination of calcium content Flame Atomic Absorption Spectrometry Posted 2008-03-31 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released Foreword GB/T 20975 "Methods for chemical analysis of aluminum and aluminum alloys" is GB/T 6987-2001 "chemical analysis of aluminum and aluminum alloys approach" repair Order, this revision of the original Standard GB/T 6987 to GB/T 20975. GB/T 20975 "Methods for chemical analysis of aluminum and aluminum alloys" is divided into 25 parts. --- Part 1. Determination of mercury content - Cold atomic absorption spectrometry; --- Part 2. Determination of arsenic content - Molybdenum blue spectrophotometric method; --- Part 3. Determination of copper content; --- Part 4. Determination of iron content phenanthroline spectrophotometry; --- Part 5. Determination of silicon content; --- Part 6. Determination of cadmium content by flame atomic absorption spectrometry; --- Part 7. Determination of manganese content - Potassium periodate spectrophotometric method; --- Part 8. Determination of zinc content; --- Part 9. Determination of lithium content Flame atomic absorption spectrometry; --- Part 10. Determination of tin content; --- Part 11. Determination of lead content by flame atomic absorption spectrometry; --- Part 12. Determination of titanium content; --- Part 13. Determination of vanadium content of benzoyl phenylhydroxylamine spectrophotometry; --- Part 14. Determination of nickel content; --- Part 15. Determination of boron content; --- Part 16. Determination of magnesium content; --- Part 17. Determination of Strontium by flame atomic absorption spectrometry; --- Part 18. Determination of chromium content; --- Part 19. Determination of zirconium content; --- Part 20. Determination of gallium content Butyl Rhodamine B spectrophotometric method; --- Part 21. Determination of calcium content by flame atomic absorption spectrometry; --- Part 22. Determination of beryllium content Eriochrome cyanide blue R spectrophotometry; --- Part 23. Determination of antimony content Potassium iodide spectrophotometry; --- Part 24. Determination of total rare earth content; --- Part 25. Inductively coupled plasma atomic emission spectrometry. This is Part 21. This Part replaces GB/T 6987.21-2001 "aluminum and aluminum alloys - Flame atomic absorption spectrometric method for the determination of calcium." Section compared with the GB/T 6987.21-2001 The main changes are as follows. --- Added "8.1 repeatability" clause; --- Added "9 quality assurance and control" clause. This part is proposed by the China Nonferrous Metals Industry Association. The non-ferrous metal part by the National Standardization Technical Committee. This part of the Northeast Light Alloy Co., Ltd., China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting. This section is drafted. Beijing Nonferrous Metal Research Institute. The main drafters of this section. Zhang, Liu, Tong Jian, Bing, Xi Huan, Geli Xin, Zhu Yuhua. This part of the standard replaces the previous editions are. --- GB/T 6987.21-1986, GB/T 6987.21-2001. Methods for chemical analysis of aluminum and aluminum alloys Part 21. Determination of calcium content Flame Atomic Absorption Spectrometry 1 Scope The sample was processed into a thickness of less than 1mm debris. ......

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