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Device for sampling and enriching gaseous volatile matters in high vacuum environment

A technology of concentrators and volatiles, applied in the direction of sampling devices, etc., can solve the problem that gaseous volatiles cannot fully meet the requirements

Inactive Publication Date: 2012-04-18
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a gaseous volatile sampling enricher in a high vacuum environment, which solves the problems that the gas sampling enricher in the prior art cannot fully meet the requirements when it is applied to monitor gaseous volatiles in a high vacuum environment.

Method used

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  • Device for sampling and enriching gaseous volatile matters in high vacuum environment
  • Device for sampling and enriching gaseous volatile matters in high vacuum environment
  • Device for sampling and enriching gaseous volatile matters in high vacuum environment

Examples

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Embodiment

[0022] Such as figure 1 and figure 2 As shown, the gaseous volatile sampling concentrator in a high vacuum environment includes a wire mesh packaging material 2 and an electrospun nanofiber mat 1 packaged in the wire mesh packaging material.

[0023] The electrospun nanofiber mat is prepared by the following method: using one or more randomly mixed polymers selected from polystyrene, styrene-methacrylic acid copolymer, polyacrylonitrile, and acrylic resin as The raw materials are stirred and dissolved in a solvent to form a mixed solution, and the mixed solution is spun by electrospinning technology to form the electrospun nanofiber mat.

[0024] The solvent is selected from one or more mixed solvents of N,N-dimethylformamide, tetrahydrofuran, ethanol and acetic acid. The diameter of the nanofibers contained in the electrospun nanofiber mat is in the range of 10-1000 nm.

[0025] Applying the enricher to the collection and measurement of the molecular pump oil atmosphere i...

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Abstract

The invention discloses a device for sampling and enriching gaseous volatile matters in a high vacuum environment. The device is characterized by comprising a silk-screen packaging material and an electrospun nano-fiber felt packaged in the silk-screen packaging material, wherein the electrospun nano-fiber felt is prepared by the steps of stirring and dissolving high polymer serving as raw materials in the presence of a solvent so as to obtain a mixed solution and then spinning the mixed solution into the electrospun nano-fiber felt by using an electrostatic spinning technique. The device disclosed by the invention can be used for sampling and enriching volatile matters in a high vacuum system, is suitable to be used in different environments, and can selectively capture target matters.

Description

technical field [0001] The invention belongs to the technical field of gas volatile matter collection, in particular to a nanofiber-based sampling enricher for gaseous volatile matter in a high-vacuum environment. Background technique [0002] The collection methods of gaseous volatiles are divided into direct analysis method, active sampling method and passive sampling method. Current online information can be obtained by direct analysis, but this method is usually expensive; active sampling must use an air pump, which is difficult to achieve in a high vacuum environment; passive sampling uses a diffusion mechanism, that is, molecular pollutants utilize natural Diffusion diffuses onto the sampler. This method combines the advantages of better sensitivity, simplicity and practicality, and more reasonable equipment prices. [0003] At present, the collection of gaseous samples can usually be carried out with a vacuumized Suma tank. The Suma tank is a metal tank with a polis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22
Inventor 康学军邓剑军张晓兵顾忠泽
Owner SOUTHEAST UNIV
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