Time domain enhanced ion migration tube

A technology of ion transfer tube and ion gate, which is applied in the field of ion transfer tubes, can solve the problems of limited range of analyzable ion mobility and inability to analyze and detect ions, and achieve the effect of high transfer electric field strength and good analysis performance

Pending Publication Date: 2021-03-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology only applies an electric field on a part of the migration area, and the mobility rang

Method used

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  • Time domain enhanced ion migration tube
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  • Time domain enhanced ion migration tube

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[0026] Example 1

[0027] The time domain electric field enhanced ion migration tube disclosed in the present invention figure 1 Indicated. The ion source 1 is 10.6 eV photoelectric exit, and acetone is used as a dopant in the ion source; the ion door 3 is a TynDall-Powell type ion door composed of a double parallel gate; the ion receive pole 5 is 6mm diameter The Faraday plate is fixed to a metal shield having an outer diameter of 30 mm; the ionization zone 2 and the migration zone 4 are each having a thickness of 1 mm, an inner diameter of 20 mm, an outer diameter of 30 mm, a thickness of 4 mm, an inner diameter of 20 mm, and an outer diameter of 30 mm. The annular insulating pole 7 is alternately overlapped, and the ionization zone 2 contains 6 annular conductive electrode sheets 6, and the migration zone 4 contains 6 annular conductive plates; the ion source 1 to the ion gate 3 direction, ionization The first annular conductive pole piece and the second annular conductive die s...

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Abstract

The invention discloses a time domain electric field enhanced ion migration tube. The time domain multistage enhancement of electric field intensity in a migration region is realized by controlling optocoupler switches in the ion migration tube. In a time interval when an ion gate is opened for ion group injection, all the optocoupler switches are in an off state, and an initial migration electricfield is maintained in the ion migration tube; after the ion gate completes ion group injection, the optocoupler switches are converted from an off state to an on state in sequence according to a specific time sequence, a time domain enhanced migration electric field is formed in the ion migration region, and multi-stage compression and enhancement are performed on the time domain width and the current density of an ion group in the ion migration region; and finally, an ion mobility spectrogram with ultrahigh resolution capability and ultrahigh sensitivity is formed. According to the design of the ion migration tube, a high-voltage power supply with a lower maximum output voltage value can be utilized to obtain the ultrahigh resolution capability and ultrahigh sensitivity analysis performance, so that the instrument cost is reduced, and the use safety of an instrument is improved.

Description

technical field [0001] The invention relates to an ion transfer tube, the core component of an ion mobility spectrometer, specifically an ion transfer tube that electrically shorts two adjacent conductive electrodes in an ionization region according to a specific time sequence, so as to realize ion migration in which the electric field strength in the transfer region is enhanced in time domain Tube. Background technique [0002] Ion Mobility Spectrometry (IMS) is a pulsed ion cluster separation and detection technique similar to time-of-flight mass spectrometry. The time-domain width and ion current density of ion clusters directly determine the resolving power and detection sensitivity of ion mobility spectrometry analysis. [0003] Published studies have shown that the ion migration electric field whose intensity jumps in time domain can effectively reduce the time domain width of ion clusters and increase the ion current density. Du Yongzhai et al. (Anal.Chem.2012, 92, ...

Claims

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Application Information

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IPC IPC(8): H01J49/06H01J49/00
CPCH01J49/0031H01J49/062
Inventor 陈创厉梅蒋丹丹肖瑶李海洋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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