"General Principles of Flame Atomic Absorption Spectrometry for Chemical Analysis of Metallurgical Products" Solicitation of Opinions

[ Policies and Regulations of Chemical Machinery Equipment Network ] In recent years, atomic absorption technology has been continuously developed.
In order to meet the increasingly stringent testing standards and requirements of various industries, various instrument manufacturers have continuously improved their instrument structure, instrument hardware, instrument software, etc.
The instrument functions have been improved, the scope of application has been expanded, and the overall performance of the instrument has also been improved.
Among them, atomic absorption spectroscopy is widely used in the quantitative analysis of metal elements because of its high sensitivity, good selectivity, quick and easy operation, high accuracy, and low instrument cost.
Based on a number of excellent properties and characteristics, this technology has been widely used in metallurgical material analysis, and has a history of more than 30 years.

 

As early as 1987, my country promulgated and implemented the "General Principles of Flame Atomic Absorption Spectrometry for Chemical Analysis of Metallurgical Products", which greatly improved the application level of atomic absorption technology in the field of metallurgical material analysis.
In order to improve the applicability and universality of the general rules, the General Iron and Steel Research Institute, the Metallurgical Industry Information Standards Institute and other units have revised the general rules.
At present, the standard has been revised, and comments are being sought from the society.

 

After reading the draft standard for comments, it can be seen that, in addition to editorial amendments, the main technical changes compared with GB/T 7728-1987 are as follows: frontiers are added, normative references are added, reagents and materials are added, instruments, Added measurement, revised instrument preparation and instrument performance judgment and requirements, revised quantitative analysis method, revised standard addition method, supplemented safety-related content, and added Appendix A and Appendix B.
Therefore, the revised standard content includes the terms involved, principles, reagents and materials, instrument composition, sample preparation, measurement condition selection, interference elimination methods, calibration solution preparation, instrument preparation, instrument performance judgment and requirements, and quantitative analysis methods.
, Instrument laboratory conditions, etc.

 

The principle of flame atomic absorption spectrometry specified in the standard is that the sample solution is sprayed into the flame in the form of mist to atomize the element to be measured, and then the light with the characteristic spectrum of the element to be measured is radiated from the light source when passing through the sample vapor.
The ground state atom of the element to be measured in the vapor is absorbed, and the absorbed part is proportional to the concentration of the atom in the flame.
Then, the content of the element to be measured in the sample is determined according to the degree of weakening or absorption of the radiation characteristic spectrum.

 

　　The equipment needed during the test consists of a light source system, an atomization system, a spectroscopic system, and a detection system.
In order to ensure the smooth progress of the experiment, the standard also stipulates the adjustment requirements of the operating parameters of the instrument.

 

　　This standard will be promoted and implemented nationwide after half a year after its issuance as a safe standard, so that laboratories can learn and master relevant requirements.
I believe that with the implementation of the new standard, flame atomic absorption spectrometry can perform better and better in the field of chemical analysis of metallurgical products.
Excellent and more positive effect.

 

　　Original title: "General Principles of Flame Atomic Absorption Spectrometry for Chemical Analysis of Metallurgical Products" Solicitation of Comments