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Dual-channel time-of-flight mass analyzer

A mass analyzer, time-of-flight technology, applied in time-of-flight spectrometers, mass spectrometers, particle separation tubes, etc., to reduce cost and time, and achieve the effect of synchronization

Inactive Publication Date: 2020-01-17
NINGBO HEIGER ELECTRICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing time-of-flight mass spectrometers cannot realize simultaneous analysis and processing of different ion sources for a sample injected in a set of equipment. In order to connect with different ion sources and realize the synchronization of time-of-flight mass analysis, a A time-of-flight mass analyzer capable of receiving two beams of ions simultaneously

Method used

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  • Dual-channel time-of-flight mass analyzer

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A dual-channel time-of-flight mass analyzer, including a vacuum cavity as a field-free flight area, a dual-channel accelerator, a dual-channel reflector and a detector, the dual-channel accelerator and 2 groups of detectors are arranged side by side on one side of the vacuum cavity, A dual-channel accelerator is set on the other side of the vacuum chamber, and a parallel ion channel for two groups of ionized ions to fly is formed in the vacuum chamber. The two groups of ionized ions pass through the accelerator, field-free flight area, reflector, and The parabolic flight trajectory in the field flight area reaches the detector.

[0029] Both the dual-channel accelerator and the dual-channel reflector adopt a dual-hole parallel structure,

[0030] The dual-channel accelerator includes an ion modulation area and an acceleration area. The dual-channel reflector includes a first reflective area b1 and a second reflective area b2. A first grid electrode g1 is arranged betw...

Embodiment 2

[0033] On the basis of Example 1, partitions are set in the vacuum chamber along the direction of ion flight, and the vacuum chamber is separated from each other to avoid mutual interference during ion flight. The dual-channel accelerator and dual-channel reverser are installed and fixed to make the dual-channel accelerator and dual-channel reverser more stable, and it is convenient to adjust the level before each other.

Embodiment 3

[0035] On the basis of Embodiment 1, the dual-channel accelerator is replaced by two independent single-hole pole pieces distributed in parallel. The dual-channel reflector is replaced by two independent single-hole pole pieces distributed in parallel. When conducting experiments, close one of the channels of the dual-channel time-of-flight mass analyzer, and selectively acquire data from one of the channels; you can also choose other types of ion sources to obtain ions, and connect to the dual-channel time-of-flight mass analyzer for analysis.

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Abstract

The invention discloses a dual-channel time-of-flight mass analyzer which comprises a dual-channel accelerator, a field-free flight area, a dual-channel reflector and dual detectors. The dual-channeltime-of-flight mass analyzer is provided with two groups of ion channels which are distributed in parallel, the central axes of the two groups of channels are on the same plane, and the two channels are distributed in parallel and do not interfere with each other. The device adopts the double-channel design, an acceleration area, a flight area and a reflection area in the prior art are structurally combined into a whole, so that the requirement for butt joint with different ion sources is met, and the synchronism of the flight time quality analysis is achieved. Then two sets of analysis data are obtained at the same time, so that the sample analysis cost is reduced, and the sample analysis time is shortened.

Description

technical field [0001] The invention belongs to the technical field of mass spectrometry instruments, in particular to a dual-channel time-of-flight mass analyzer. Background technique [0002] The principle of time-of-flight-MS (TOF-MS) is that the ions entering the flight area fly under the action of kinetic energy and electric field, and the flight time of ions with relatively small mass-charge is short, while those with relatively large mass-charge Ions have a long flight time, so that ions with different mass-to-charge ratios arrive at the detector at different times and are separated. Existing time-of-flight mass spectrometers cannot realize simultaneous analysis and processing of different ion sources for a sample injected in a set of equipment. In order to connect with different ion sources and realize the synchronization of time-of-flight mass analysis, a A time-of-flight mass analyzer that simultaneously receives two beams of ions. Contents of the invention [...

Claims

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Application Information

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IPC IPC(8): H01J49/40
CPCH01J49/40H01J49/403H01J49/405
Inventor 丁利清江蒋伟王季诚
Owner NINGBO HEIGER ELECTRICAL APPLIANCES
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