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Ion mobility spectrometry

An ion mobility spectrometer and ion mobility technology, applied in the field of ion mobility spectrometer, can solve the problems of difficult to completely seal the migration tube, difficult to migrate the concentricity of the tube, etc., and achieve the effect of small loss

Active Publication Date: 2012-01-11
深圳市证谱智能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structure of the ion transfer tube in the prior art, especially the ion transfer region, is composed of many annular electrodes and insulating rings, so it is difficult to ensure the complete sealing of the transfer tube to the outside world, and it is not easy to assemble Consistent Concentricity of Transfer Tubes

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Embodiment Construction

[0047] Below, the present invention will be described in detail with reference to the accompanying drawings.

[0048] The present embodiment provides a kind of ion mobility spectrometer, and this ion mobility spectrometer comprises: transfer tube, amplifier, A / D sampler, data processing unit and display unit, wherein, amplifier is connected with transfer tube through Faraday detector, uses To amplify the tiny current signal pA~nA in the migration tube and output it to the A / D sampler. The A / D sampler converts the analog signal into a digital signal and then outputs it to the data processing unit. The data processing unit performs ion mobility analysis. After the data is processed, it is compared with the data stored in the database, and the comparison result is displayed through the display unit.

[0049] Here, the data processing unit performs the data processing of the ion mobility, which may be the data processing of the ion mobility of the sample molecule described in the ...

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Abstract

The invention provides an ion mobility spectrometry, which comprises a drift tube, an amplifier, an A / D sampler, a data processing unit and a display unit; an ion source is disposed in the drift tube, and comprises a power supply, a discharge body which can generate ions, and an ion extraction electrode; a high-voltage end of the discharge body is connected to the power supply; the low-voltage end is grounded by a current-limiting resistor R1; one end of the ion extraction electrode is connected to the high-voltage end of the discharge body by a divider resistor R3, and the other end is grounded by a divider resistor R2. According to the ion mobility spectrometry of the invention, through the improvement of the structure of the ion source, ions generated by the ion mobility spectrometry can be extracted effectively, and the stability of the discharge of the ion source is not influenced.

Description

technical field [0001] The invention relates to the technical field of ion mobility, in particular to an ion mobility spectrometer. Background technique [0002] Every molecule, especially an organic molecule, has its own unique size, molecular shape, and charge ratio. Therefore, the ionized molecules are accelerated in the electric field or electromagnetic mixed field, and due to the collision of the reverse migration gas (buffer gas), the ionized molecules will move in a straight line or in a circle at a certain speed at a constant speed, which can be measured . Based on this measurable velocity, the corresponding mobility of the corresponding molecule is calculated, from which the type of the molecule can be determined. [0003] Ion Mobility Spectrometer (IMS, Ion Mobility Spectrometer) is such an instrument that uses the principle that ion migration has a specific mobility to detect molecules in a given sample. In recent years, with the increasing demand for food safe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/70H01J49/26H01J49/10
Inventor 张伟马军颜毅坚徐翔刘立秋张亦扬
Owner 深圳市证谱智能科技有限公司
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