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GB/T 33672-2017 English PDF

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GB/T 33672-2017: Cavity Ring-Down Spectroscopy system for measurement of atmospheric methane
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GB/T 33672-2017English139 Add to Cart 3 days [Need to translate] Cavity Ring-Down Spectroscopy system for measurement of atmospheric methane Valid GB/T 33672-2017

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Basic data

Standard ID GB/T 33672-2017 (GB/T33672-2017)
Description (Translated English) Cavity Ring-Down Spectroscopy system for measurement of atmospheric methane
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A47
Classification of International Standard 07.060
Word Count Estimation 7,758
Date of Issue 2017-05-12
Date of Implementation 2017-12-01
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 working principle, composition, function, technical requirements and installation environment requirements of the optical cavity decay spectroscopy system for observing atmospheric methane concentration. This standard is suitable for atmospheric cavity methane optical cavity ring attenuation spectrum observation, also applies to the observation system design, processing and so on.

GB/T 33672-2017: Cavity Ring-Down Spectroscopy system for measurement of atmospheric methane

---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.
Cavity Ring-Down Spectroscopy system for measurement of atmospheric ICS 07.060 A47 National Standards of People's Republic of China Atmospheric Methane Optical Cavity Attenuation Spectral Observation System 2017-05-12 released 2017-12-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by the China Meteorological Administration. This standard by the National Climate and Climate Change Standardization Technical Committee of Atmospheric Component Observation and Forecasting Service Subcommittee (SAC/TC540/SC1). The drafting of this standard. China Meteorological Bureau Meteorological Survey Center, China Meteorological Science Research Institute. The main drafters of this standard. Fang Shuangxi, Liang Miao, Liu Lixin, Yao Bo, Xia Lingjun, Wang Hongyang, Pan Jingjing, Li Geng, Xu Lina, Chen Liqu. Atmospheric Methane Optical Cavity Attenuation Spectral Observation System

1 Scope

This standard specifies the working principle, composition and function of the optical cavity decay spectroscopy observation system for observing the atmospheric methane concentration. The technical requirements And installation environment requirements. This standard is applicable to atmospheric cavity methane optical cavity ring attenuation spectroscopy observation, also applies to the observation system design, processing and so on.

2 terms and definitions

The following terms and definitions apply to this document. 2.1 CavityRing-DownSpectroscopymethod; CRDS A beam of single-wavelength laser into the cavity, the beam back and forth between the mirror reflection. When the light source is cut off, its energy will decay with time, The rate of attenuation is related to the loss of the optical cavity itself (including transmission, scattering) and absorption of the intracavitary medium. According to the speed of light energy attenuation The method of the content of the component to be tested. 2.2 Standard gas standardgas To dry clean air for the gas, the target substance concentration known mixed gas. Note. rewrite from QX/T 125-2011, define 10.2. 2.3 Work standard standard workingstandardgas The standard gas used to quantitatively measure the concentration of the target substance in the sample. Note. rewrite from QX/T 125-2011, defined 10.8. 2.4 Target standard targetstandardgas Used to check and evaluate the operating conditions of the measurement system and are treated as regular and repeated measurements of the sample gas. Note. rewrite from QX/T 125-2011, define 10.9. 2.5 Sample gas samplegas The gas is measured by the measuring system.

3 working principle

The sample collection and processing unit draws the air from the sampling line, and after the temperature balance, pressure control, drying and other treatment, by the air/standard gas Select the unit to select the sample gas or standard gas into the optical cavity to ring the host unit measurement, the relevant data stored in the data acquisition and processing unit. according to The different responses of the system to air/standard gas can quantify the target substance concentration in the sample. The target substance content is determined according to formula (1). χ = Total = NAPV RT RT NAPV · 1 c · σ (υ) · 1 τυ () - τempty ÷ (1)

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