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Device and method for preparing hydrogen-deuterium standard gas

A technology for preparing a device and standard gas, applied in standard gas analyzers, chemical instruments and methods, mixing methods, etc., can solve the problems of difficult to obtain hydrogen isotope standard gas, difficult to purchase, etc., and achieves small expansion uncertainty and simple structure. , the effect of easy operation

Pending Publication Date: 2018-02-16
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0003] There are hydrogen isotope standard gases with relevant concentrations in foreign countries, but it is not easy to buy, and it is difficult to obtain hydrogen isotope standard gases in China, and there are no relevant literatures to consult

Method used

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  • Device and method for preparing hydrogen-deuterium standard gas

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0033] The preparation device of exemplary hydrogen-deuterium standard gas of the present invention is as figure 1 As shown, it includes hydrogen raw material gas cylinder 1, deuterium raw gas cylinder 2, spare raw gas cylinder 3, pressure gauge 4 (range 0-25MPa), high-precision pressure gauge 5 (range 0-1000Torr, relative measurement error is less than 0.1 %), high-precision pressure gauge 6 (range 0-100Torr, measurement relative error is less than 0.1%), isotope mass spectrometer 7, gas distribution cylinder 8 (material is aluminum alloy material, pressure resistance is 25Mpa), reference gas cylinder 9 ( It is also used as a spare gas distribution cylinder, made of aluminum alloy, with a pressure resistance of 25Mpa), vacuum unit 10, hydrogen gas delivery pipeline 11, deuterium gas delivery pipeline 12, spare raw material gas de...

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Abstract

The invention belongs to the field of technologies for preparing standard gas, and relates to a device and a method for preparing hydrogen-deuterium standard gas. The device comprises a hydrogen raw gas steel cylinder, a deuterium raw gas steel cylinder, a hydrogen delivery pipeline, a deuterium delivery pipeline, a gas delivery main pipeline, a gas delivery bypass pipeline, a general pressure gauge, high-precision pressure gauges, a gas distribution cylinder, a vacuum unit, a mass comparator, a reference gas cylinder and valves. The device and the method for preparing the hydrogen-deuterium standard gas have the advantages that the low-abundance hydrogen-deuterium standard gas (with the deuterium abundance lower than or equal to 1%) can be prepared by the aid of gravimetric processes under the condition of high preparation precision requirements, and the medium and high-abundance hydrogen-deuterium standard gas (with the deuterium abundance higher than 1%) can be prepared by the aid of volumetric processes under the condition of the high preparation precision requirements; the hydrogen-deuterium standard gas can be prepared by optional one of the gravimetric processes and the volumetric processes under the condition of low preparation precision requirements.

Description

technical field [0001] The invention belongs to the technical field of standard gas preparation, and relates to a preparation device and method for hydrogen-deuterium standard gas. Background technique [0002] Hydrogen is the main industrial raw material, and it is also an important industrial gas and special gas, and hydrogen isotope gas plays an important role in the defense industry. In many projects, it is necessary to use analytical equipment to accurately quantitatively analyze the hydrogen isotope abundance in samples at each stage of the process, so as to monitor the process and measure the product abundance. To obtain accurate isotopic abundance values ​​for hydrogen isotopic gases, the analytical equipment must first be calibrated using a hydrogen isotopic reference sample of known composition. [0003] There are hydrogen isotope standard gases with relevant concentrations in foreign countries, but they are not easy to buy. At present, it is difficult to obtain h...

Claims

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Application Information

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IPC IPC(8): B01F3/02B01F15/04B01F15/00G01N33/00B01F23/10
CPCG01N33/0006B01F23/19B01F2035/351B01F35/2113B01F35/2213B01F35/2217B01F35/2218B01F35/881B01F35/88B01F35/8821B01F2101/23
Inventor 武超任英
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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