Ionic migration spectrometer

An ion mobility spectrometer and ion technology, applied in the field of ion mobility detection, can solve problems such as inaccurate detection results, and achieve the effects of improving sensitivity, ensuring detection resolution, and improving accuracy

Active Publication Date: 2014-06-25
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0004] Publication No. 1513114 discloses a radial disk ion mobility spectrometer, but the mobility meter is prone to inaccurate detection results during detection

Method used

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Embodiment Construction

[0021] The preferred embodiments of the invention will be further described in detail below.

[0022] Such as figure 1 with 2 As shown, an ion mobility spectrometer of an embodiment includes a central electrode 2, an upper ring electrode, a lower ring electrode, a shield grid 5, a detection electrode 6 and an ion gate 7, and the upper ring electrode and the lower ring electrode The shape electrodes are opposite up and down, and the linear central electrode 2 passes through the center of the upper ring electrode and the lower ring electrode, wherein the upper ring electrode can have a plurality of ring electrodes with the same center of circle arranged outwards in sequence: the first The upper ring-shaped electrode 11, the second upper ring-shaped electrode 12...and the outermost upper ring-shaped electrode 15 closest to the detection electrode 6, correspondingly, the lower ring-shaped electrode also has a plurality of ring-shaped electrodes with the same center of circle: the...

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Abstract

The invention discloses an ionic migration spectrometer. The ionic migration spectrometer comprises an upper annular electrode, a lower annular electrode, a central electrode, a detection electrode and a shielding grid, wherein the upper annular electrode and the lower annular electrode are arranged oppositely and concentrically in the vertical direction, the central electrode is located in the circle center of the upper annular electrode, an ion source area is formed among the central electrode, the upper annular electrode and the lower annular electrode, and an ion drifting area is formed among the detection electrode, the upper annular electrode and the lower annular electrode. The detection electrode comprises a lateral part of a set cylinder, the shielding grid is a conductor and is located between the ion drifting area and the detection electrode, and the shielding grid is provided with voltage lower than the voltage of the central electrode when the voltage of the central electrode is higher than the voltage of the detection electrode and provided with voltage higher than the voltage of the central electrode when the voltage of the central electrode is lower than the voltage of the detection electrode. The ionic migration spectrometer has higher accuracy and higher sensitivity.

Description

【Technical field】 [0001] The invention relates to the field of ion mobility detection, in particular to an ion mobility spectrometer. 【Background technique】 [0002] Ion Mobility Spectrometry (IMS, Ion Mobility Spectrometry) is an instrument that detects sample substances based on the difference in the migration speed of ions in an electric field. The sample is ionized into sample ions in the ionization device, and introduced into the drift region where there is a linear DC electric field, and the ions are separated from each other by the difference in the migration speed of the gas phase ions in the electric field, so as to realize the separation and characterization of different sample ions . [0003] The miniaturization of ion mobility spectrometers is a major trend, gradually developing from vehicle-mounted and desktop to portable and hand-held lightweight instruments. Most existing ion mobility spectrometers use linear transfer tubes, and all ions move in the same dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/02H01J49/26G01N27/62G01N27/622
Inventor 余泉刁兆亮倪凯钱翔王晓浩唐飞
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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