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GB/T 7728-2021: Chemical analysis of metallurgical products - General rule for flame atomic absorption spectrometric methods
Status: Valid GB/T 7728: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 7728-2021 | English | 359 |
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Chemical analysis of metallurgical products - General rule for flame atomic absorption spectrometric methods
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GB/T 7728-2021
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| GB/T 7728-1987 | English | 199 |
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Chemical analysis of metallurgical products. General rule for flame atomic absorption spectrometric methods
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GB/T 7728-1987
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Basic data | Standard ID | GB/T 7728-2021 (GB/T7728-2021) | | Description (Translated English) | Chemical analysis of metallurgical products - General rule for flame atomic absorption spectrometric methods | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H04 | | Word Count Estimation | 18,125 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 7728-2021: Chemical analysis of metallurgical products - General rule for flame atomic absorption spectrometric methods
---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.
Chemical analysis of metallurgical products - General rule for flame atomic absorption spectrometric methods
ICS 77.080
CCSH04
National Standards of People's Republic of China
Replace GB/T 7728-1987
Chemical analysis of metallurgical products
General Principles of Flame Atomic Absorption Spectrometry
Released on 2021-08-20
2022-03-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Principle 1
5 Reagents and materials 1
5.1 Reagent 1
5.2 Water 1
5.3 Gas 2
6 Instrument 2
6.1 Light source system 2
6.2 Atomization System 2
6.3 Spectroscopic system 2
6.4 Detection system 2
6.5 Background Correction System 2
7 Determination 2
7.1 Preparation of test solution 2
7.2 Selection of measurement conditions 3
7.3 Interference in the measurement and its elimination method 4
8 Preparation of calibration solution 4
9 Instrument preparation and performance requirements 5
9.1 Adjustment of instrument operating parameters 5
9.2 Optimization of instrument parameters 5
9.3 Instrument performance requirements 5
10 Quantitative analysis methods 7
10.1 Calibration curve method 7
10.2 High-precision ratio method (matrix matching method) 8
10.3 Standard Addition Method 8
10.4 Presentation method of measurement results 9
11 Laboratory environment requirements 9
12 Requirements for storage and use of high-pressure gas 9
12.1 High-pressure gas storage requirements 9
12.2 Requirements for the use of high-pressure gas 10
Appendix A (Informative) Basic Principles of Atomic Absorption 11
Appendix B (informative) Non-absorption resonance line used for background correction 12
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 7728-1987 "General Principles of Flame Atomic Absorption Spectrometry for Chemical Analysis of Metallurgical Products", and is in line with GB/T 7728-1987
Compared with 1987, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The "Scope of Application" is changed to "Scope", and the content is changed (see Chapter 1, Chapter 1 of the 1987 edition);
b) Added "Reagents and Materials" section (see Chapter 5);
c) The "Instrument" part has been added to specify the requirements of the instrument in detail (see Chapter 6);
d) The "Determination" part has been added, and detailed requirements for the selection of test preparation and determination conditions have been made (see Chapter 7);
e) Adjust the "Note" part of "Calibration Solution Preparation" to the main text (see Chapter 8, Chapter 5 of the 1987 edition);
f) Change "Instrument preparation and instrument performance judgment and requirements" to "Instrument preparation and performance requirements" (see Chapter 9, 1987
Chapter 6 of the Year Edition);
g) The value of k in the calculation formula of the detection limit of the instrument has been changed (see 9.3.3, 6.3.3 of the 1987 edition);
h) Change "calibration method, measurement and result calculation" to "quantitative analysis method" (see Chapter 10, Chapter 7 of the 1987 edition);
i) The formula for calculating the mass concentration of analytical elements in the "zero" calibration solution is changed (see 10.1.4, 7.1.3 in the 1987 edition);
j) Change the "high-precision measurement method" to "high-precision ratio method (matrix matching method)" (see 10.2, 1987 edition of 7.2);
k) Part of the "Standard Access Law" has been changed (see 10.3, 7.3 of the 1987 edition);
l) Added "Laboratory Environment Requirements" (see Chapter 11);
m) Added "High-pressure gas storage and use requirements" (see Chapter 12);
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed by the China Iron and Steel Association.
This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183).
Drafting organizations of this document. STEEL NAC Testing Technology Co., Ltd., Anyang Iron and Steel Co., Ltd., Maanshan City Product Quality Supervision
Supervisory Inspection Institute, Metallurgical Industry Information Standards Research Institute.
The main drafters of this document. Fan Xiaofen, Luo Qianhua, Zhu Xingjiang, Cao Shuwei, Liu Qingbin, Liu Zheng, Qi Rong, Yang Guowu, Gan Zhengbin, Zhou Yonghao,
Yu Zhihua, Chen Zibin, Zhu Rong.
This document was first published in 1987, and this is the first revision.
Chemical analysis of metallurgical products
General Principles of Flame Atomic Absorption Spectrometry
1 Scope
This document specifies the principles, reagents and materials, instrument composition, measurement methods, and methods of flame atomic absorption spectrometry for chemical analysis of metallurgical products.
Calibration solution preparation, instrument preparation and performance requirements, quantitative analysis methods, laboratory environment requirements.
This document is applicable to the application, research and personnel training of flame atomic absorption spectrometry for chemical analysis of metallurgical products.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 4470 Terminology for flame emission, atomic absorption and atomic fluorescence spectrometry
GB 4962 Hydrogen Safety Technical Regulations
GB/T 6682 Analytical laboratory water specifications and test methods
GB 6819 dissolved acetylene
3 Terms and definitions
The terms and definitions defined in GB/T 4470 are applicable to this document.
4 Principle
The sample solution is sprayed into the flame as a mist to atomize the element to be measured. The light radiated from the light source with the characteristic spectrum of the element to be tested passes the test
When the vapor is sampled, it is absorbed by the ground state atom of the element to be measured in the vapor, and the absorbed part is positive to the concentration of the atom in the flame under certain conditions.
Compare. The content of the element to be measured in the sample is determined according to the degree of weakening (absorption) of the characteristic spectrum of radiation. See the basic principles of atomic absorption
Appendix A.
5 Reagents and materials
5.1 Reagents
When no other requirements are indicated, the reagents used in the experiment refer to reagents of analytical grade or above.
Inorganic acids are commonly used in sample processing, such as hydrochloric acid, nitric acid, perchloric acid, and hydrofluoric acid. The reagent blank should be checked before use, and the reagent blank value should be
Meet the blank requirements specified by the relevant testing standards.
5.2 Water
The experimental water should conform to the secondary or tertiary water specified in GB/T 6682.When conducting trace analysis, it should be used in accordance with GB/T 6682
The prescribed first grade water.
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