A pulsed ion trap transfer tube with carrier gas and transfer gas

An ion trap migration tube and migration gas technology, applied in the field of ion transfer tubes, can solve the problems of high sample ion loss rate, inability to quickly switch detection modes, low detection accuracy, etc., to overcome characteristic ion peak drift and improve system sensitivity , The effect of simplifying the system structure

Active Publication Date: 2017-02-15
GUANGDONG NANHAI ETETB TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a pulsed ion trap transfer tube with carrier gas and transfer gas to simultaneously solve the technical problems of low detection accuracy, high sample ion loss rate and inability to quickly switch detection modes in the above-mentioned traditional ion transfer tube.

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  • A pulsed ion trap transfer tube with carrier gas and transfer gas
  • A pulsed ion trap transfer tube with carrier gas and transfer gas

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Embodiment Construction

[0013] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described below with reference to the accompanying drawings and examples.

[0014] Such as figure 1 As shown, a pulsed ion trap migration tube with carrier gas and migration gas provided by the present invention includes: an insulating tube 1, a diaphragm 2, an ionization source 3, a single gate ion gate 4, a migration ring 5, a shielding grid 6 and a Faraday Disk 7.

[0015] The insulating tube 1 constitutes the outer wall of the migration tube in the present invention, and one end of the insulating tube 1 is set as an open type, and the other end is set as a closed type. In the inner cavity of the insulating tube 1, from the open end to the closed end, a diaphragm 2, an ionization source 3, a single gate ion gate 4, a transfer ring 5, a shielding grid 6 and a Faraday disk 7 are arranged in sequence, wherein the diaphra...

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Abstract

The invention provides a pulsed ion trap transfer tube with carrier gas and transfer gas, which includes an insulating tube with one end set as an open type and the other end as a closed type. The set diaphragm, ionization source, single grid ion gate, transfer ring, shielding grid and Faraday disk; the side wall of the insulating tube between the diaphragm and the ionization source is provided with a carrier gas inlet; the ionization source and The side wall of the insulating tube between the single-grid ion gates is provided with an exhaust gas outlet; the side wall of the insulating tube between the shielding grid and the Faraday disk is provided with a migration gas inlet. The present invention can realize the coordinated detection of positive and negative ions by applying excitation electric fields with different properties on the ion trap, and adopts the mode of independent gas supply of carrier gas and migration gas, which overcomes the phenomenon of characteristic ion peak drift caused by too high concentration of sample molecules, At the same time, the technical problems of high product ion loss rate, poor spectrum stability and long analysis time of traditional transfer tubes are solved.

Description

technical field [0001] The invention relates to an ion transfer tube, in particular to a pulse ion trap transfer tube with carrier gas and transfer gas. Background technique [0002] Ion mobility spectrometer is an efficient and sensitive trace detection equipment, which can be used for rapid detection of drugs and explosives. Among them, the transfer tube is the core component of the ion mobility spectrometer. There are two types of traditional transfer tubes. One is the single gas path ion trap transfer tube (see US Patent 5200614). The formation and storage of product ions are completed in the ion trap, with The product ion formation efficiency is high, the loss rate is low, and the detection mode can be quickly switched. However, when the concentration of the detected sample molecules is high, limited by the ionization capacity of the ion trap, a large number of unionized sample molecules enter the migration area with the carrier gas. , causing the characteristic ion pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J49/04H01J49/00G01N27/62G01N27/622
Inventor 郭会勇周虎
Owner GUANGDONG NANHAI ETETB TECH CO LTD
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