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Membrane feeding device on gas analysis mass spectrometer

A technology of gas analysis and mass spectrometer, which is applied to the parts of particle separator tubes, sample introduction/extraction, etc., which can solve the problems of reduced mass spectrometry sensitivity, small membrane area, inconvenient replacement, etc., to avoid frequent damage, save time and The effect of energy consumption

Active Publication Date: 2014-05-07
SHANGHAI UNIV +2
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] 1. The membrane area is generally very small, which reduces the sensitivity of mass spectrometry;
[0006] 2. Most of the membrane sampling devices are designed to be directly connected to the vacuum system of the mass spectrometer, which is very inconvenient for membrane replacement

Method used

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  • Membrane feeding device on gas analysis mass spectrometer

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Embodiment Construction

[0020] refer to figure 1 , the film sampling device on the gas analysis mass spectrometer of the present invention comprises a pressure film box 13, a front connecting flange 3 and a rear connecting flange 8, and the front connecting flange 3 and the rear connecting flange 8 are all provided with a Groove, the pressure film box 13 is closely matched between the front end connection flange 3 and the rear end connection flange 8 through the groove, and the pressure film box 13 is composed of a pressure film box cover 4, a film 5, a support net 6, The film box body 7 is composed of the film box cover 4 and the film box body 7, and the film 5 and the support net 6 are pressed in between. The space between the film box cover 4 and the film 5 constitutes the sample chamber 12. The space between the net 6 and the lamination box body 7 constitutes a buffer chamber 11 .

[0021] There are two circular through holes in the groove of the front connecting flange 3, the inner diameter is ...

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Abstract

The invention discloses a membrane feeding device on a gas analysis mass spectrometer. The device comprises a membrane press box, a front end connecting flange and a rear end connecting flange, wherein a groove is formed on the front end connecting flange and the rear end connecting flange respectively; the membrane press box is closely matched through the grooves between the front end connecting flange and the rear end connecting flange; the contact faces of the membrane press box and front end connecting flange are respectively provided with a sample inlet for inflow of a sample molecule and a sample outlet for allowing the sample molecule to flow out; and the contact faces of the membrane press box and the rear end connecting flange are provided with mass spectrometric connecting pipes. According to the device, the replacement of the membrane press box is greatly facilitated; and furthermore, connection and disconnection between a buffer chamber and the mass spectrometric sample inlet can be realized by a vacuum isolating valve in the mass spectrometric connecting pipe, thus frequent destruction to the vacuum system of the mass spectrometer is avoided. The device can be widely applied to the field of gas mass spectrometers.

Description

technical field [0001] The invention relates to a membrane sampling device, in particular to a membrane sampling device on a gas analysis mass spectrometer. Background technique [0002] Volatile organic compounds are a class of important air pollutants composed of hundreds of compounds, which widely exist in the environment. It not only affects the atmospheric environment and climate, but also has direct harm to the human body. In order to understand the source and distribution of volatile organic compounds in the atmosphere, it is extremely important to develop analytical instruments capable of real-time online detection of volatile organic compounds. There are many technologies that can detect volatile organic compounds, but there are not many methods that can truly realize real-time online detection. It is extremely important to develop a feasible technology for real-time online analysis of volatile organic compounds in my country's volatile organic compound research a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J49/04
Inventor 李梅洪义黄正旭董俊国傅忠周振
Owner SHANGHAI UNIV
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