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Ion migration spectrometer based on sample through membrane

An ion mobility spectrometer and membrane sampling technology, which is applied in the preparation of test samples, instruments, scientific instruments, etc., can solve the problems of slow samples, low sample ionization efficiency, low transmittance, etc., and achieve relative humidity Decrease, increase the response sensitivity, and improve the effect of relative concentration

Inactive Publication Date: 2007-02-21
上海新漫传感科技有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a portable membrane-sampling ion mobility spectrometer for detecting organic pollutants in the air, which overcomes the shortcomings of the existing membrane sampling device, such as low transmittance, slow speed, and sample residue, and the ionization of the sample in the reaction chamber. The disadvantage of low efficiency can quickly separate and detect trace organic pollutants in the air

Method used

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  • Ion migration spectrometer based on sample through membrane
  • Ion migration spectrometer based on sample through membrane
  • Ion migration spectrometer based on sample through membrane

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Embodiment Construction

[0028] see Figure 1~4 , including: vacuum ultraviolet lamp 1, ultraviolet lamp excitation module 2, ultraviolet light window 3, reaction chamber acceleration electrode 4, ion gate 5, ionization reaction chamber 6, reaction chamber inlet 7, ion drift region 8, ultraviolet Lamp excitation electrodes 9, 10, exhaust port 11, air sample inlet 12, micro-sampling pump 13, dry carrier gas inlet 14, polydimethylsilicone resin film 15 in the prior art, enhanced polydimethylsiloxane Silicone resin membrane 16, micro air pump 17, annular conductive ring 18, edge ring 19, metal grid 20, receiving electrode 21, membrane front cavity 22, membrane rear cavity 23, temperature controller 24, drift gas 25.

[0029] like Figure 4 As shown, the micro-sampling pump 13 draws the sample air to be tested into the pre-membrane chamber 22 of the membrane sampling device through the air sample inlet 12 . The membrane front cavity 22 and the membrane rear cavity 23 are separated by a mechanically rein...

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Abstract

An ion migration spectroscope based on film sample feed-in consists of film sample feeding in unit, vacuum ultraviolet ray source, ionizing reaction region, ion gate, ion floating region and receiving electrode.

Description

technical field [0001] The invention relates to a technology for ionization, separation and detection of chemical substances, especially an ion mobility spectrometer (Ion Mobility Spectrometer, IMS) with a semi-permeable membrane as a separation membrane sampling device. Background technique [0002] Ion mobility spectrometry is a technique for the ionization, separation and detection of chemical species at atmospheric pressure. It can detect and distinguish chemical species in a very short time and provide quantitative information. In the 1970s, ion mobility spectrometry developed rapidly, and because of its extremely high sensitivity and response speed, it was quickly used in the military field to detect chemical warfare agents. Since the 1980s, ion mobility spectrometry has gradually begun to be used in civilian applications, and has been applied in the fields of environment, factories, life safety, anti-smuggling and aerospace. [0003] An ion mobility spectrometer usu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N1/28G01N27/64G01N27/622
CPCG01N27/622G01N27/64
Inventor 易洪江王倩
Owner 上海新漫传感科技有限公司
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