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GB/T 5832.3-2011 English PDF

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GB/T 5832.3-2011: Determination of moisture in gases -- Part 3: The method of Cavity Ring-Down Spectroscopy
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GB/T 5832.3-2011English139 Add to Cart 3 days [Need to translate] Determination of moisture in gases -- Part 3: The method of Cavity Ring-Down Spectroscopy Valid GB/T 5832.3-2011

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Basic data

Standard ID GB/T 5832.3-2011 (GB/T5832.3-2011)
Description (Translated English) Determination of moisture in gases -- Part 3: The method of Cavity Ring-Down Spectroscopy
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G86
Classification of International Standard 71.040.40
Word Count Estimation 6,683
Date of Issue 2011-12-30
Date of Implementation 2012-10-01
Quoted Standard GB/T 3723
Regulation (derived from) Announcement of Newly Approved National Standards No. 23 of 2011
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the use of cavity ring down spectroscopy method for the determination of trace moisture in gases terms and definitions, methods, principles, general requirements for instrumentation, test procedures, results processing and reporting. This section applies to the content of the volume fraction of 0. 2 �� 10 (-9) ~ 20 �� 10 (-6) Determination of moisture in the gas. Does not apply in case of light such as silane decomposition and absorption spectra of water containing the interfering component gas moisture content.

GB/T 5832.3-2011: Determination of moisture in gases -- Part 3: The method of Cavity Ring-Down Spectroscopy


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Determination of moisture in gases Part 3. The method of Cavity Ring-Down Spectroscopy ICS 71.040.40 G86 National Standards of People's Republic of China Determination of trace moisture in the gas Part 3. cavity ring-down spectroscopy Part 3. ThemethodofCavityRing-DownSpectroscopy Issued on. 2011-12-30 2012-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 5832 "Determination of trace water gas" is currently divided into three parts. --- Part 1. electrolysis; --- Part 2. dew point method; --- Part 3. cavity ring-down spectroscopy. This is Part 3. This section drafted in accordance with GB/T 1.1-2009 given rules. This part is proposed by the China Petroleum and Chemical Industry Association. This part of the National Gas Standardization Technical Committee (SAC/TC206) centralized. This section is drafted. Southwest Chemical Industry Research and Design Institute, Quest (Beijing) Technology Co., Ltd., China Institute of Metrology, Shanghai meter Testing Technology Research Institute quantity, Xian Ding research technology limited liability company. The main drafters of this section. Yan Wenbin, Wang Yamin, Zhouze Yi, Chen Ying, He Daoshan, Chen Yali, Zhou Pengyun, Danzhao Qi. Determination of trace moisture in the gas Part 3. cavity ring-down spectroscopy

1 Scope

This section provides the use of cavity ring-down spectroscopy measurement terms and definitions gas trace water, principle of the method, the instrument generally Requirements, testing procedures, results processing and reporting. This section applies to the determination of the content of the volume fraction of 0.2 × 10-9 ~ 20 × 10-6 gas moisture. Does not apply to the case of silane Light and easy to decompose gas measurement of water absorption spectrum interference components contained in the water.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 3723 Sampling of chemical products for industrial use General Safety

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Cavity Cavity By a high specular reflectivity of the optical resonator consisting of a stable. 3.2 Cavity ring-down CavityRing-Down Light in the cavity bounces back and forth oscillation due to the absorption loss and component test chamber cavity, the light intensity over time was N times the single exponential decay. 3.3 Cavity ring-down time Cavityring-DownTime Light photons attenuation chamber to the initial amount of 1/e (e is a natural number) when the elapsed time.

4 principle of the method

A bunch of single-wavelength laser light into the chamber, the light beam reflected back and forth between the mirrors oscillation. After cutting off the light source, the energy will change over time Decay, its rate of decay and loss optical cavity (including transmission, scattering) and the absorption chamber component being tested (medium) related. For a given Optical cavity, its loss is constant. Speed \u200b\u200band attenuation of light energy content of the measured component relevant. The content of the component being tested in its molecule Optical density is proportional to the cavity, the density of molecules by the ring-down time according to equation (1) determines. D = 1c · σ (ν) · 1 () τν - τempt (1) Where. τempty --- without absorption medium ring-down time in seconds (s); c --- the speed of light;

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