Purification system for nitrogen gas and xenon gas in water and isotope static analysis method thereof

Patent metadata

Field	Value
Publication number	US-12566154-B2
Application number	US-202117559882-A
Country	US
Kind code	B2
Filing date	Dec 22, 2021
Priority date	Aug 27, 2021
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A purification system for nitrogen gas and xenon gas in water and a static isotopic analysis method thereof are provided. The system includes a sample container, a carbon dioxide ice cold trap, a gas delivery main pipe and a mass spectrometer for noble gas communicated sequentially. The gas delivery main pipe is provided with branch pipelines communicated with a cryo pump and a vacuum pump set respectively, the mass spectrometer for noble gas is communicated with the vacuum pump set, and the cryo pump adsorbs or releases nitrogen gas and/or xenon gas by setting different temperatures of the cryo pump. Inlet and outlet sides of the carbon dioxide ice cold trap are respectively provided with a first valve and a second valve. Fourth and fifth valves are respectively disposed between the gas delivery main pipe and the vacuum pump set, and between the gas delivery main pipe and the cryo pump.

First claim

What is claimed is:

1 . A purification system for nitrogen gas and xenon gas in water, the purification system comprising a sample container, a carbon dioxide ice cold trap, a gas delivery main pipe and a mass spectrometer for noble gas that are communicated with the sample container sequentially, wherein the gas delivery main pipe is provided with branch pipelines that are communicated with a cryo pump and a vacuum pump set respectively, the mass spectrometer for noble gas is communicated with the vacuum pump set, and the cryo pump is configured to be set at different temperatures to adsorb or release the nitrogen gas and/or the xenon gas; and
an inlet side and an outlet side of the carbon dioxide ice cold trap are respectively provided with a first valve and a second valve, a fourth valve is disposed between the gas delivery main pipe and the vacuum pump set, a fifth valve is disposed between the gas delivery main pipe and the cryo pump, a seventh valve is disposed between the gas delivery main pipe and the mass spectrometer for noble gas, and a ninth valve is disposed between the mass spectrometer for noble gas and the vacuum pump set, wherein a gas delivery branch pipe is disposed between the gas delivery main pipe and the mass spectrometer for noble gas, the gas delivery branch pipe comprises a nitrogen gas delivery branch pipe and a xenon gas delivery branch pipe that are disposed in parallel, the seventh valve is disposed on the nitrogen gas delivery branch pipe, and a sixth valve is disposed on the xenon gas delivery branch pipe.

2 . The purification system for nitrogen gas and xenon gas in water according to claim 1 , wherein a molecular sieve for filtering water molecules is disposed between the first valve and the carbon dioxide ice cold trap.

3 . The purification system for nitrogen gas and xenon gas in water according to claim 2 , wherein another branch pipeline is disposed on the gas delivery main pipe to communicate with a CuO furnace, and a third valve is disposed between the CuO furnace and the gas delivery main pipe.

4 . The purification system for nitrogen gas and xenon gas in water according to claim 1 , wherein an adsorbent container and an eighth valve are disposed sequentially in a direction close to the mass spectrometer for noble gas on the xenon gas delivery branch pipe between the sixth valve and the mass spectrometer for noble gas.

5 . The purification system for nitrogen gas and xenon gas in water according to claim 2 , wherein an adsorbent container and an eighth valve are disposed sequentially in a direction close to the mass spectrometer for noble gas on the xenon gas delivery branch pipe between the sixth valve and the mass spectrometer for noble gas.

6 . The purification system for nitrogen gas and xenon gas in water according to claim 3 , wherein an adsorbent container and an eighth valve are disposed sequentially in a direction close to the mass spectrometer for noble gas on the xenon gas delivery branch pipe between the sixth valve and the mass spectrometer for noble gas.

Assignees

• Inst Geology & Geophysics Cas

Inventors

• Liu Ziheng
• Li Jiannan
• Su Fei
• He Huaiyu

Classifications

• G01N2001/4088

  filtration · CPC title

• G01N1/42

  Low-temperature sample treatment, e.g. cryofixation · CPC title

• G01N1/4077

  by other techniques involving separation of suspended solids · CPC title

• F25J3/08

  Separating gaseous impurities from gases or gaseous mixtures {or from liquefied gases or liquefied gaseous mixtures}(cold traps B01D8/00) · CPC title

• B01D8/00

  Cold traps; Cold baffles (pumps for evacuating by condensing or freezing F04B37/08) · CPC title