|
US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 20975.21-2020: Methods for chemical analysis of aluminium and aluminium alloys - Part 21: Determination of calcium content
Status: Valid GB/T 20975.21: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20975.21-2020 | English | 189 |
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 20975.21-2008 | English | 239 |
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
|
PDF similar to GB/T 20975.21-2020
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Count Estimation | 10,160 | | Date of Issue | 2020-09-29 | | Date of Implementation | 2021-08-01 | | Older Standard (superseded by this standard) | GB/T 20975.21-2008 | | Regulation (derived from) | National Standard Announcement No. 20 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 20975.21-2020: Methods for chemical analysis of aluminium and aluminium alloys - Part 21: Determination of calcium content
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
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
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 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
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 20975.21-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 20975.21-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 20975.21-2020_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 20975.21-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. Question 5: Should I purchase the latest version GB/T 20975.21-2020?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20975.21-2020 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.
|