Ion migration spectrum instrument

An ion mobility spectrometer and ion source technology, applied in mass spectrometers, electronic/ion optical devices, parts of particle separator tubes, etc., can solve the problems of difficult focusing electrodes, restricting instrument resolution and sensitivity, etc. Improve performance, improve ion utilization, and ensure the effect of resolution

Inactive Publication Date: 2013-10-23
中国人民解放军63975部队
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to the shielding effect of the electric field, it is difficult for the guiding focusing electrode to function effectively, and i...

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  • Ion migration spectrum instrument
  • Ion migration spectrum instrument
  • Ion migration spectrum instrument

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Embodiment Construction

[0030] The present invention can be applied to the positive ion mode and the negative ion mode of the transfer tube in the ion mobility spectrometer. The positive ion mode of the transfer tube is taken as an example below, and the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0031] figure 1 is a schematic diagram of an ion storage structure of an ion mobility spectrometer (IMS) according to an embodiment of the present invention. Such as figure 1 As shown, the ion storage structure of the ion mobility spectrometer according to the embodiment of the present invention includes an ion source electrode 1 , a focusing guide electrode 4 and an ion storage electrode 5 arranged in sequence.

[0032] Such as figure 2 As shown, the ionization source electrode 1 is in the shape of a stainless steel cylinder, and the side close to the focusing guide electrode 4 has an inner chamfer. Such a design is conducive to ...

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Abstract

The invention discloses an ion migration spectrum instrument comprising an ion source electrode, a focus guiding electrode and an ion storage electrode, wherein the focus guiding electrode is arranged at one side of the ion source electrode, the ion storage electrode is arranged at one side of the focus guiding electrode, and the side of the focus guiding electrode is far away from the ion source electrode. The voltage of the focus guiding electrode and the ion storage electrode is controlled, and migration pipe work control is realized. At an ion storage phase, an ionized zone generates a lot of ions which are stored at an area between the focus guiding electrode and the ion storage electrode; at an ion lead-out phase, ions enter a migration zone in a very short time. An ion storage structure of the ion migration spectrum instrument is characterized in that stored ions can be led into the migration zone in a very short time; a net structure of the ion storage electrode guarantees that the stored ions do not overflow because excessive ions are stored; the structure can improve ion utilization rate of the migration pipe to 10% to 20%, and therefore detection sensitivity of the migration pipe is improved.

Description

technical field [0001] The invention relates to an ion mobility spectrometer applied to the detection of drugs and explosives and an ion storage and derivation method thereof, belonging to the technical field of safety detection. Background technique [0002] Usually in ion mobility spectrometry, the ion gate in the transfer tube adopts Bradbury-Nielson structure. In this kind of ion gate, the tensioned thin metal wires are arranged in parallel on the same plane with a small interval, and the two groups of connected metal wires are structurally separated in the form of interdigitated fingers, and are electrically insulated and fixed together in different places. conductive support. The wire must be pulled taut when installing it, but the wire is easily snapped. The thermal expansion and contraction of the metal wire may also cause loosening or breakage of the metal wire. Regardless of the design, non-parallel wires, bends, or other imperfections can lead to poor performan...

Claims

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Application Information

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IPC IPC(8): H01J49/26H01J49/06
Inventor 杨杰曹树亚郭成海赵将蒋颜玮邵晟宇潘勇杨柳
Owner 中国人民解放军63975部队
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