GB/T 33360-2016 in English
VALIDGas analysis―Guidelines for purification of gases for trace analysis instrument
- Issued on:2016-12-30
- Implemented on:2018-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 33360-2016气体分析 痕量分析用气体纯化技术导则》由TC206（全国气体标准化技术委员会）归口，TC206SC1（全国气体标准化技术委员会气体分析分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
1. Background and significance of standard formulation
Trace analysis technology in gas analysis is of great significance for scientific research and industrial detection. With the continuous improvement of the sensitivity of analytical instruments, the purity requirements for gas preparation are becoming increasingly stringent. This standard systematically regulates the deep purification technology of trace analysis gases to ensure that the target component content of the purified gas is less than 0.01×10-6, and is suitable for the preparation of zero gas, gas chromatography carrier gas and standard gas for instrument calibration.
2. Comparative analysis of standard frameworks
| Technical methods | Applicable gases | Impurity types to be removed | Purification indicators | Application scenarios |
|---|---|---|---|---|
| Metal getter method | Inert gases such as helium and neon | Water, oxygen, carbon monoxide, etc. | Target component content: < 0.01×10-6 | Gas chromatography carrier gas purification |
| Deoxidizer and molecular sieve adsorption method | Nitrogen, hydrogen, etc. | Oxygen, moisture, hydrocarbons, etc. | Target component content: < 0.01×10-6 | Preparation of zero gas for instrument calibration |
| Catalytic reaction method | Gas containing oxygen or hydrogen | Carbon monoxide, alkanes, etc. | Target component content: < 0.01×10-6 | Calibration of trace analysis instruments |
3. Detailed explanation of technical methods and application cases
3.1 Metal getter method
This method uses specific metal materials to adsorb impurity gases and is suitable for the preparation of high-purity inert gases. For example, in gas chromatography analysis, the use of metal getter method can effectively remove trace impurities in the carrier gas and ensure the accuracy of the analysis results.
3.2 Low-temperature adsorption method
The impurity gas is physically adsorbed by the adsorbent in the liquid nitrogen or liquid argon cold trap. This method is particularly suitable for the purification of small molecular gases such as hydrogen, and its technical indicators can meet the needs of trace analysis.
4. Implementation suggestions and precautions
- Gas pipeline selection: It is recommended to use 316L stainless steel pipes with electrochemical polishing on the inner wall to reduce the adsorption loss of the target component.
- Purifier installation: Ensure vertical installation and avoid inverted airflow direction to extend the life of the equipment.
- Flow Control: Keep the gas flow through the purifier below its rated maximum flow to maintain efficient purification effect.
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