GB/T 8981-2008 English PDF

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GB/T 8981-2008: Determination of trace hydrogen in gases -- Gas chromatographic method
Status: Obsolete

GB/T 8981: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 8981-2008	239	Add to Cart	3 days	Determination of trace hydrogen in gases -- Gas chromatographic method	Obsolete
GB/T 8981-1988	199	Add to Cart	2 days	Determination of trace hydrogen in gases--Gas chromatographic method	Obsolete

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Basic data

Standard ID: GB/T 8981-2008 (GB/T8981-2008)
Description (Translated English): Determination of trace hydrogen in gases -- Gas chromatographic method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G86
Classification of International Standard: 71.040.40
Word Count Estimation: 6,636
Date of Issue: 2008-05-15
Date of Implementation: 2008-11-01
Older Standard (superseded by this standard): GB/T 8981-1988
Quoted Standard: GB/T 3723; GB/T 6680; GB/T 6681
Regulation (derived from): National Standard Approval Announcement 2008 No.8 (Total No.121)
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 gas chromatographic determination of trace amounts of hydrogen gas. This standard applies to nitrogen, determination of xenon bulbs with argon and other gases and trace hydrogen, argon, oxygen, air, krypton. Also applies to the field of medicine and electricity. Measurement range is 0. 02 ~ 100X10-6 (volume fraction). When the sample contains 200X10-6 (volume fraction) than neon or 1000X10-6 (volume fraction) than helium, it will interfere with the determination of hydrogen. This time must be hydrogen and helium, After Ne separation can only apply this standard.

GB/T 8981-2008: Determination of trace hydrogen in gases -- Gas chromatographic method

---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.
Determination of trace hydrogen in gases. Gas chromatographic method ICS 71.040.40 G86 National Standards of People's Republic of China Replacing GB/T 8981-1988 Determination of trace hydrogen gas by Gas Chromatography Posted 2008-05-15 2008-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 8981-1988 "Determination of trace hydrogen gas in gas chromatography." This standard and GB/T 8981-1988 comparison, the main differences are as follows. --- Modify the scope of application (see Chapter 1); --- Confirmation increases the detection limit (8.3 of this standard). The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee gases. This standard was drafted. Southwest Chemical Industry Research and Design Institute. The main drafters of this standard. He Daoshan, Chen Yali, Zhang, on behalf of Gao. This standard replaces the standards previously issued as follows. --- GB/T 8981-1988. Determination of trace hydrogen gas by Gas Chromatography

1 Scope

This standard specifies the gas chromatographic determination of trace hydrogen gas. This standard applies to nitrogen, argon, oxygen, air, krypton, and xenon bulb determination of trace gases such as hydrogen, argon, and also applies to areas such as medicine and electricity area. Determination range of 0.02 ~ 100 × 10-6 (volume fraction). When the sample containing 200 × 10-6 (volume fraction) than neon or 1000 × 10-6 (volume fraction)) than helium, hydrogen will Determination of interference. This time to be hydrogen and helium, neon this standard can only apply after the separation.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 3723 Sampling of chemical products for industrial use General Safety (GB/T 3723-1999, idt ISO 3165. 1976) GB/T 6680 General rules for sampling liquid chemical products GB/T 6681 General rules for sampling gaseous chemical products

3 Method summary

This law semiconductor gas (gas-sensing resistor) as a chromatography detector. Hydrogen components are detected by the carrier gas into the column separated into the subject Detector, semiconductor gas causes a change in conductivity, the voltage signal is given in a certain range is proportional to the hydrogen content. The sample of hydrogen Signal signal and standard samples in hydrogen compared quantitatively.

4 Instrument

By gas chromatograph with a gas-sensitive semiconductor detector. Detection limit. 0.02 × 10-6 (volume fraction). Instrument chromatographic process shown in Figure 1. 1 --- control valve; 2,4 --- color gel drying tube; 3 --- AgX zeolite (oxidation state) purged; 5 --- injector; 6 --- column; 7 --- detector; 8 --- flowmeter. 1 chromatogram flowchart of FIG. ......

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