Sample preparation system with functions of extraction and separation of inert gas, and use thereof

Abstract

The invention relates to a sample preparation system with functions of extraction and separation of inert gas, and a use thereof. A left mechanical pump is connected to a first main pipe through a stainless steel straight pipe. A right mechanical pump is connected to a molecular pump and a low-temperature refrigerator through a quick-release four-way valve. A sample inlet is connected to the first main pipe. The first main pipe is connected to a film gauge and a first active carbon furnace. A second main pipe is connected to a high-vacuum gauge pipe, a second active carbon furnace, the molecular pump, a zirconium-based furnace and a titanium sponge furnace. A third main pipe is connected to an ion vacuum gauge, an ion pump, a getter pump, a pressure stem valve assembly, and a third active carbon furnace. A fourth main pipe is connected to the low-temperature refrigerator, an inert gas isotope mass spectrometry host machine, and a quadrupole mass spectrometer. The use of the sample preparation system with functions of extraction and separation of inert gas comprises system vacuum-pumping, sample injection control, sample purification, sample separation, and component and isotope determination. Through the sample preparation system with functions of extraction and separation of inert gas, a system vacuum degree is improved by 5 magnitudes; a rate of pollution of Ar in air on Ar in a natural gas sample is reduced to a few parts per ten thousand from a few parts per hundred; and the detection accuracy of Ar isotopes in natural gas is improved.

Description

technical field [0001] The invention relates to a sample preparation system for extracting and separating inert gas in natural gas and its application. Background technique [0002] At present, the existing problems in the pretreatment of natural gas inert gas isotope analysis are: the lack of isotope analysis pretreatment equipment seriously limits the function of the inert gas isotope mass spectrometer host; the Ar gas in the atmosphere seriously pollutes the Ar gas in natural gas samples; the reactive gas Contamination of the host of inert gas isotope mass spectrometry; insufficient dynamic limit vacuum of the pre-processing equipment, relatively large gas leakage rate, relatively high blank background, and fewer detection items. Contents of the invention [0003] The purpose of the present invention is to provide a device that can make up for the shortage of natural gas isotope analysis pretreatment devices, overcome the serious pollution of Ar gas in natural gas sampl...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a device that can make up for the shortage of natural gas isotope analysis pretreatment devices, overcome the serious pollution of Ar gas in natural gas samples by Ar gas in the atmosphere, the pollution of active gas to the main engine, the low parameters of pretreatment equipment, and the lack of detection items, etc. Establish a set of sample preparation system and its application method for the extraction and separation of inert gas in natural gas with high vacuum, low leak rate, and low blank background

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