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Gas sample introduction device and application thereof

A sampling device, gas sampling technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that are not conducive to the automation of automatic sampler, increase the number of analysis of a single sample, consume analysis time, etc., to achieve convenient isotope analysis work, avoid multiple injections, simple operation

Active Publication Date: 2015-05-20
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This undoubtedly increases the number of analyzes of a single sample, and doubles the analysis time, resulting in low work efficiency.
Since the difference in the injection volume is almost two orders of magnitude, it is undoubtedly not conducive to the automation of the test work by using an autosampler.

Method used

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  • Gas sample introduction device and application thereof
  • Gas sample introduction device and application thereof
  • Gas sample introduction device and application thereof

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with the embodiments and drawings, which are only for illustration and not limiting the scope of application of the present invention.

[0047] figure 1 It is a schematic structural diagram of the sampling state of the gas sampling device of the present invention for hydrocarbon isotope analysis in natural gas. like figure 1 As shown, the gas sampling device of the present invention includes a sampling assembly, a sampling assembly and a cold trap assembly.

[0048] The sample injection assembly includes a four-way injector 106 containing a 1 μL sample slit 11 and a six-way injector 107 containing a 100 μL sample loop 12, and the sampling channels of the four-way injector 106 and the six-way injector 107 Respectively set in parallel with respective sample quantification components 11 and 12, the sampling channels of the four-way sample injector 106 and the six-way sample injector 107 are connected ...

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Abstract

The invention relates to a gas sample introduction device. The gas sample introduction device can perform two or more different volume sample introduction successively, has the characteristics of accurate quantification, simple operation, continuous operation, no dead volume, convenient connection with detection system, and matching use with an automatic sample injector, and realizes automated analysis of batch gas samples. By applying the variable volume sample introduction technology provided by the invention to analysis of carbon-hydrogen isotopes in natural gas, the requirements for determining the isotope ratio of different concentration component (carbon dioxide, methane, ethane, propane, isobutane, n-butane) of hydrogen and carbon can be satisfied, the signal response of all stratographic components in an isotope mass spectrometer is within a dynamic varying range and is close to working standard signal intensity as far as possible, thereby avoiding multiple injection of isotope analysis, facilitating laboratory isotope analysis work, and improving the work efficiency of sample test.

Description

technical field [0001] The invention belongs to the technical field of hydrocarbon isotope analysis, and relates to a gas sampling device and its application in hydrocarbon isotope analysis in natural gas. Background technique [0002] The hydrocarbon isotopes of various compounds in natural gas samples are important geochemical tracers. However, the relative concentrations of gas components (carbon dioxide, methane, ethane, propane, isobutane, n-butane) in the samples are quite different, especially in the currently explored natural gas fields, which are highly evolved and mainly composed of methane. Objectively, the determination of hydrogen and carbon isotope ratio requires that the signal response of each separated component in the isotope mass spectrometer must meet its dynamic range and be as close as possible to the working standard signal intensity. For this purpose analysts use small volume injections (5 μL) for methane and large volume injections (500 μL) for etha...

Claims

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Application Information

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IPC IPC(8): G01N30/16
Inventor 陶成腾格尔王杰杨华敏把立强
Owner CHINA PETROLEUM & CHEM CORP
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