GB/T 14265-2017 in English
VALIDGeneral rule of chemical analysis for hydrogen, oxygen, nitrogen, carbon and sulfur in metallic materials
- Issued on:2017-10-14
- Implemented on:2018-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 14265-2017金属材料中氢、氧、氮、碳和硫分析方法通则》由TC243（全国有色金属标准化技术委员会）归口，TC243SC3（全国有色金属标准化技术委员会稀有金属分会）执行，主管部门为中国有色金属工业协会。
Introduction
In-depth interpretation of GB/T 14265—2017 “General Methods for Analysis of Hydrogen, Oxygen, Nitrogen, Carbon and Sulfur in Metallic Materials”
| Standard Dimensions | Old version (GB/T 14265—1993) | New version (GB/T 14265—2017) |
|---|---|---|
| Definition of terms | Concepts such as total hydrogen and total oxygen are not clarified | 15 new terms such as total hydrogen and total oxygen are added to cover more detection dimensions |
| Basic principles | Gas extraction and time-of-flight mass spectrometry are not included | New advanced detection technologies such as gas extraction principle, thermal conductivity method and time-of-flight mass spectrometry |
| Instrument requirements | The description of equipment performance is relatively brief | The technical parameters of heat source, extraction device and measurement device are refined, and the requirements of components such as high-frequency generator and resistance furnace are added |
Standard formulation background and technology evolution analysis
Since its release in 1993, the GB/T 14265 series of standards has been the basic specification for the analysis methods of hydrogen, oxygen, nitrogen, carbon and sulfur in metal materials in my country. With the advancement of science and technology and the innovation of detection technology, the original standards can no longer meet the needs of modern high-precision analysis. The new version of the standard combines international advanced experience and has been comprehensively optimized in terms of terminology, basic principles and instrument requirements.
1. Expansion of terms and definitions
The new standard adds core concepts such as total hydrogen, total oxygen, and total carbon in the terminology section, and redefines professional terms such as surface carbon and dissolved hydrogen. These improvements make the standard more scientific and operational, and provide a clearer theoretical basis for the formulation of subsequent analytical methods.
2. Evolution of analytical technology
The new version of the standard introduces a variety of advanced detection principles, including:
- Gas Extraction: Through high-temperature melting and inert gas loading, efficient extraction of the elements to be tested is achieved.
- Thermal Conductivity: Quantitative analysis is performed using the difference in thermal conductivity coefficients of different gases.
- Time-of-Flight Mass Spectrometry: Accurate qualitative and quantitative analysis is achieved through ion mass-to-charge ratio separation.
3. Requirements for upgrading instruments and equipment
The new standard puts forward higher performance requirements for analytical instruments, including:
- Heat source components: High-frequency generators and resistance furnaces must have stable temperature control capabilities.
- Extraction devices: The sealing and pumping rates of vacuum melting and inert gas melting systems have been significantly improved.
- Measurement devices: New requirements for high-sensitivity equipment such as thermal conductivity cell detectors (TCDs) and infrared absorption detectors.
Implementation recommendations and precautions
1. Basic conditions for standard implementation
Before implementing the new version of the standard, the laboratory must ensure that:
- Analytical instruments and equipment that meet the requirements are equipped.
- Operators receive professional training and are familiar with the differences between the old and new standards.
- Establish a sound quality control system to ensure the accuracy and reliability of the test results.
2. Key points in the implementation process
In actual operation, the following points should be noted:
- Strictly follow the test conditions specified in the standard for sample pretreatment and analysis.
- Select appropriate standard substances for instrument calibration to ensure that the linear range and sensitivity meet the requirements.
- Perform blank tests and recovery rate verification regularly to ensure the reliability of data.
3. Opportunities brought by standard updates
The release of the new version of the standard has brought important development opportunities for metal material testing technology:
- Improve detection accuracy: The introduction of advanced analytical technologies, such as time-of-flight mass spectrometry, has significantly improved detection sensitivity.
- Expand application areas: The new standard is applicable to a wider range of metal material types, meeting the detection needs of high-end fields such as aerospace, petrochemicals, etc.
- Promote technological innovation: The update of standards promotes the upgrading of analytical equipment and reagent technology, and drives technological progress in the entire industry.
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