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Gas chromatographic detection system and method for analyzing hydrogen isotopes and trace impurity components in He

A hydrogen isotope and detection system technology, applied in the field of gas chromatography analysis, can solve the problems of long time, difficult hydrogen isotope separation and online quantitative measurement, and achieve the effect of convenient operation and meeting the analysis requirements

Active Publication Date: 2016-05-11
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, due to the long analysis time of conventional gas chromatography, it is difficult to separate and quantitatively measure the hydrogen isotope components
In addition, the existing research on the tritium-related system of the ITER tritium breeding cladding module proposes a high-standard analysis requirement that the detection limit of trace gas components is not greater than 100ppb, and the detection time is not higher than 160s, which is difficult to achieve by conventional gas chromatography systems

Method used

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  • Gas chromatographic detection system and method for analyzing hydrogen isotopes and trace impurity components in He
  • Gas chromatographic detection system and method for analyzing hydrogen isotopes and trace impurity components in He
  • Gas chromatographic detection system and method for analyzing hydrogen isotopes and trace impurity components in He

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Embodiment 1

[0105] This embodiment is used to illustrate the method of analyzing trace impurity gases in helium using a DID detector.

[0106] Use the method described above to purge the entire gas circuit system with each carrier gas (combined with Figure 1). After the output pressure of the sample gas is stable, go through steps a1-a2-a3 of the method described above (combined with figure 2 , 3 ) and steps b1-b2-b3 (combining figure 2 , 4 ), adjust the different states of each valve to achieve the purpose of sample loading, sample injection, analysis and detection respectively.

[0107] The He carrier gas flow rate is 15mL / min, the sample gas He contains about 1.0ppm impurity gas components, the selected capacity of the quantitative tube II9 in the step a1 is 0.5mL, and the first chromatographic separation column 10-1 adopted in the step a3 is 15m× 0.53mm×50μm molecular sieve capillary column (MS), the second chromatographic separation column 10-2 used in step b3 is a 15m×0.53mm×40μm...

Embodiment 2

[0110] This embodiment is used to illustrate the method of analyzing trace amounts of hydrogen isotope gas in helium using a DID detector.

[0111] Use the method described above to purge the entire gas circuit system with various carrier gases (combined with Figure 1). After the output pressure of the sample gas is stable, go through steps c1-c2-c3 of the method described above (combined with Figure 5 , 6 ), adjust the different states of each valve to achieve the purpose of sample loading, sample injection, analysis and detection respectively.

[0112] The carrier gas flow rate is 9.0mL / min, the content of trace hydrogen and deuterium components in the sample gas He is about 1000ppm, the selected capacity of quantitative tube I8 in step c1 is 0.25mL, and the third chromatographic separation column 10-3 used in step c3 At the temperature of liquid nitrogen, it is a 0.6×3.0mm alumina-manganese chloride coated modified packed column. Under this condition, H 2 -HD components ...

Embodiment 3

[0115] This example is used to illustrate the method of analyzing the percentage content of hydrogen isotope gas in helium by TCD.

[0116] Use the method described above to purge the entire gas circuit system with various carrier gases (combined with Figure 1). After the output pressure of the sample gas is stable, go through steps d1-d2-d3 of the method described above (combined with Figure 7 , 8 ), adjust the different states of each valve to achieve the purpose of sample loading, sample injection, analysis and detection respectively.

[0117] The carrier gas flow rate is 40.0mL / min, the content of hydrogen and deuterium components in the sample gas He is 8%, the selected capacity of quantitative tube I8 in step d1 is 1.0mL, and the third chromatographic separation column 10-3 adopted in step d3 At the temperature of liquid nitrogen, it is a 4m×0.53mm aluminum oxide-manganese chloride coated modified capillary column. Under this condition, H 2 -The resolution of HD compo...

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Abstract

The invention relates to a gas chromatographic detection system and method for analyzing hydrogen isotopes and trace impurity components in He. The system comprises a six-way valve I (1), a ten-way valve (2), a six-way valve II (3), a four-way valve (4), an eight-way valve (5), a helium discharge ionization detector (6), a thermal conductivity detector (7), a quantitative pipe I (8), a quantitative pipe I (9), a first chromatographic separation column (10-1), a second chromatographic separation column (10-2), a chromatographic separation column (10-3) and He carrier first, second, third, fourth and fifth branches (101, 102, 103, 104 and 105). A multi-dimensional gas chromatographic detection system is integrated with a gas chromatographic path system, so that trace and percentage hydrogen isotopes and trace impurity gas components in gas of a tritium extraction process can be quickly and precisely measured on line; therefore, multiple high-standard analysis requirements can be met, and the gas chromatographic detection system is convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of gas chromatography analysis, and in particular relates to a gas chromatography detection system and method for analyzing hydrogen isotopes and trace impurity components in He. Background technique [0002] Fusion energy is a long-term solution to human future energy due to the advantages of sufficient resources and no high-level radioactive waste. The deuterium-tritium fusion reaction produces neutrons and helium atoms, and the neutrons bombard the small lithium ceramics in the fusion reactor structural cladding. Substances such as spheres can release a large amount of energy while achieving tritium multiplication. [0003] In the research of the International Thermonuclear Experimental Reactor (International Thermonuclear Experimental Reactor: "ITER Program"), the fusion reactor deuterium-tritium fuel cycle system mainly includes two systems of internal and external circulation, of which the internal cir...

Claims

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Application Information

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IPC IPC(8): G01N30/02
CPCG01N30/02G01N2030/025
Inventor 杨洪广杨丽玲占勤刘振兴刘振启
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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