GB/T 5832.4-2020 English PDF

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GB/T 5832.4-2020: Gas analysis. Determination of moisture - Part 4: The method of quartz crystal oscillation
Status: Valid

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Basic data

Standard ID: GB/T 5832.4-2020 (GB/T5832.4-2020)
Description (Translated English): Gas analysis. Determination of moisture - Part 4: The method of quartz crystal oscillation
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G86
Classification of International Standard: 71.100.20
Word Count Estimation: 5,545
Date of Issue: 2020-11-19
Date of Implementation: 2021-10-01
Quoted Standard: GB/T 3723
Regulation (derived from): National Standard Announcement No. 26 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the principle, instrument requirements, measurement procedures, result processing and test reports for the determination of trace moisture in gas by the quartz crystal oscillation method. This standard is applicable to the determination of trace moisture in gases such as hydrogen, oxygen, nitrogen, helium, neon, argon, krypton, xenon, sulfur hexafluoride, carbon monoxide, nitrous oxide, air and their mixed gases. It is not applicable to quartz crystals There are corrosive gases and gases that can react with moisture. Measuring range: 0.1X10^(-6) (volume fraction) ~ 2 000X10^(-6) (volume fraction).

GB/T 5832.4-2020: Gas analysis. Determination of moisture - Part 4: The method of quartz crystal oscillation

---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.
Gas analysis - Determination of moisture - Part 4.The method of quartz crystal oscillation ICS 71.100.20 G86 National Standards of People's Republic of China Determination of trace moisture in gas analysis Part 4.Quartz Crystal Oscillation Method 2020-11-19 released 2021-10-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword

GB/T 5832 "Determination of Trace Moisture in Gas Analysis" is divided into multiple parts, currently divided into 4 parts. ---Part 1.Electrolysis method; ---Part 2.Dew point method; ---Part 3.Optical cavity ring-down spectroscopy; ---Part 4.Quartz crystal oscillation method. This part is Part 4 of GB/T 5832. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part was proposed by the China Petroleum and Chemical Industry Federation. This part is under the jurisdiction of the National Gas Standardization Technical Committee (SAC/TC206). Drafting organizations of this section. Fuzhou Product Quality Inspection Institute, China Institute of Testing Technology, Institute of Chemistry, Yunnan Metrology and Testing Technology Research Institute, Southwest Chemical Research and Design Institute Co., Ltd., China Environmental Monitoring Station, Southwest Oil and Gas Field of China National Petroleum Corporation Branch Natural Gas Research Institute, China Petroleum & Chemical Corporation Natural Gas Branch Metrology Research Center, Chongqing Ecological Environment Monitoring Center Xin, Chongqing Institute of Metrology and Quality Inspection, Hunan Institute of Metrology and Inspection, Michell Instrument (Shanghai) Co., Ltd., Xi'an Dingyan Technology Co., Ltd. Co., Ltd. The main drafters of this section. Li Lirong, Pan Yi, Zhang Shaowang, Zhou Pengyun, Yang Jing, Zhou Li, Chen Yali, Wang Weikang, Zhang Wen, Ruan Jun, Teng Man, Cai Li, Pei Quanbin, Qu Wei, Zhang Wen, Xu Yang, Zhu Xiang, Ren Yun, Chen Jun, Shi Zhaoqi, Ren Lei, Xiong Huajing. Determination of trace moisture in gas analysis Part 4.Quartz Crystal Oscillation 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. ......

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