An ion mobility spectrometer

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

Active Publication Date: 2016-05-04
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • An ion mobility spectrometer
  • An ion mobility spectrometer
  • An ion mobility spectrometer

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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 ion mobility spectrometer, comprising an upper annular electrode, a lower annular electrode, a central electrode, a detection electrode and a shielding grid. The position of the center of the ring electrode, the ion source area is formed between the center electrode and the upper ring electrode and the lower ring electrode, and the ion drift area is formed between the detection electrode and the upper ring electrode and the lower ring electrode. The detection electrode includes setting On the side part of the cylinder, the shielding grid is a conductor and is located between the ion drift region and the detection electrode; the shielding grid is used to apply a voltage less than the central electrode voltage when the central electrode voltage is greater than the detection electrode voltage, and when the central electrode voltage is less than the detection electrode When the electrode voltage is applied, a voltage greater than the center electrode voltage is applied. The ion mobility spectrometer has high accuracy and high 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, IonMobility 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 dire...

Claims

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Application Information

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Patent Type & Authority Patents(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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