GB/T 5832.4-2020Gas analysis—Determination of moisture—Part 4: The method of quartz crystal oscillation (English PDF)
气体分析 微量水分的测定 第4部分：石英晶体振荡法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
November 19, 2020
Implementation date
October 1, 2021
Scope
GB/T 5832.4-2020 is the English-translated version of 气体分析 微量水分的测定 第4部分：石英晶体振荡法.
GB/T 5832.4-2020 is the Chinese standard "Gas analysis—Determination of moisture—Part 4: The method of quartz crystal oscillation".
Its scope clause reads: This part of GB/T 5832 specifies the principle, instrument requirements, measurement procedures, and method for the determination of trace moisture in gas by the quartz crystal oscillation method.
Results processing and test report.
This part applies to hydrogen, oxygen, nitrogen, helium, neon, argon, krypton, xenon, sulfur hexafluoride, carbon monoxide, nitrous oxide, air and other gases and their mixtures The determination of trace moisture in the body is not suitable for gases that are corrosive to quartz crystals and gases that can react with moisture.
Measuring range. 0.1×10-6 (volume fraction)~2000×10-6 (volume fraction). Its clauses include terms and definitions; principle of the method.
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Document preview — GB/T 5832.4-2020
National Standard of the People's Republic of China
- ICS
- 71.100.20
- Classification
- G 86
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle of the method
1 Scope
This part of GB/T 5832 specifies the principle, instrument requirements, measurement procedures, and method for the determination of trace moisture in gas by the quartz crystal oscillation method.
Results processing and test report.
This part applies to hydrogen, oxygen, nitrogen, helium, neon, argon, krypton, xenon, sulfur hexafluoride, carbon monoxide, nitrous oxide, air and other gases and their mixtures
The determination of trace moisture in the body is not suitable for gases that are corrosive to quartz crystals and gases that can react with moisture. Measuring range.
0.1×10-6 (volume fraction)~2000×10-6 (volume fraction).
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 document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 3723 General Rules for Sampling Safety of Industrial Chemical Products
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Quartz crystal microbalance
A resonant mass sensor made of the piezoelectric characteristics of a quartz crystal will produce a very stable vibration when a voltage is applied to the sensor.
3.2 Representative sample
A sample that has the same composition as the gas being collected and is considered to be completely homogeneous.
4 Principle of the method
The basic principle and basis of the quartz crystal microbalance (QCM) used in the gas phase is the Sauerbrey equation, when the external attachment is evenly divided
When it is placed on the surface of the quartz crystal and the mass of the adsorbed material is much smaller than the mass of the quartz crystal, the change between the mass and the frequency is proportional.
When measuring the trace moisture in the gas, the surface of the quartz crystal is coated with a hygroscopic coating. When the sample gas is passed into the measuring chamber with QCM When the coating on the surface of the quartz crystal absorbs moisture, the quality of the surface of the quartz crystal changes the natural oscillation frequency of the quartz crystal, and the
The frequency changes proportionally with the change in the water content of the coating.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 5832.1-2016 — Gas analysis - Determination of water - Part 1: Electrolytic method
GB/T 5832.2-2016 — Gas analysis - Determination of water - Part 2: Dew point method
GB/T 5832.3-2025 — Gas analysis — Determination of moisture in gases — Part 3: The method of cavity ring-down spectroscopy
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