Ionized gas detection device

A detection device and ionization technology, applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of mutual interference of ion generators, etc., and achieve the effect of improved resolution, simple structure and best detection effect

Active Publication Date: 2010-12-15
CHENGDU ACTION ELECTRONICS JOINT STOCK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The invention also solves the problem that charged ions react with neutral molecules in the migration region
[0015] The invention also solves the problem of mutual interference between the ion generator, radio frequency electric field and detection electrodes

Method used

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Examples

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Embodiment

[0044] In this example, the sample gas stream 17 carries a mixture of acetone and toluene into the ionized gas detection device. The sample gas flow rate 17 was 1 L / min. The speed of carrier gas flow 1 can be adjusted in the range of 2-10L / min. In this example, a DC voltage of 7V is applied to the separation electrode 2, and the unionized acetone molecules and toluene molecules are collected by the gas collection device 7 under the action of the sample gas flow 17, and then discharged after purification and filtration. Under the action of the separation electrode 2 , the ionized acetone ions and toluene ions are deflected and enter the migration region 11 . Carrier gas flow 1 in this example is 99.999% N 2 , the gas flow rate is adjusted to 2.5L / min, carrying acetone ions and toluene ions are separated in the migration area 11, the migration area (i.e. the size of the electrode plate 5, see Figure 5 ) can be selected as 20×10×2mm 3 . The parameters of the pulse voltage c...

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Abstract

The invention relates to the technology of trace material detection, and discloses an ionized gas detection device. An open corona discharge ionic generator is adopted to improve the performance of the ionic generator. The invention adopts a technical scheme that: the ionized gas detection device comprises the ionic generator, an ionic filter and an ionic detector, wherein the ionic generator generates detecting ions; the ionic filter is used for generating an electric field so as to prevent non-detected ions from passing and allow detected ions to pass; the ionic detector is used for detecting the ions passing through the ionic filter; the ionic generator is formed by a rectangular metal box which is arranged in a passage of sample gas flow and carrier gas flow, so that the sample gas flow and the carrier gas flow pass from two sides of the rectangular metal box respectively; one side of the rectangular metal box is opened, and the open side faces the sample gas flow; and a spray point is arranged in the metal box, and the sample gas flow is ionized through discharging between the spray point and the metal box. The device can be used for a miniature gas detection device.

Description

technical field [0001] The invention relates to trace substance detection technology, in particular to an ionized gas detection device using a high-field asymmetric waveform ion migration filter for ion filtration. Background technique [0002] In the Second World War, the emergence of highly toxic nerve agents on the battlefield caused a large number of deaths of people and animals. In recent years, with the rampant terrorism, the gas phase detection of explosives, drugs and other substances has become more and more important. As a result, many countries in the world have made every effort to develop and gradually equip advanced biochemical detection equipment for the detection of chemical warfare agents on the ground, in weapons and equipment, in the air, and in water. However, the current detection devices have some disadvantages: huge equipment, high cost, poor mobility, long detection time, etc., which are difficult to meet the practical application. The high-field as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/70
Inventor 钟其水何柳魏季水
Owner CHENGDU ACTION ELECTRONICS JOINT STOCK
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