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Mass spectrometry method and mass spectrometry device with atmospheric pressure interface

A mass spectrometry, atmospheric pressure technology, applied in the field of mass spectrometry, can solve the problems of non-inclusion, increase of structural complexity, etc.

Active Publication Date: 2016-03-23
NAT INST OF METROLOGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, its positive / negative ions are only limited to be generated under vacuum. On the other hand, this patent does not include the treatment of neutral substances generated by the ion source. On the other hand, it requires the use of two mass analyzers, which increases the structural complexity

Method used

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  • Mass spectrometry method and mass spectrometry device with atmospheric pressure interface
  • Mass spectrometry method and mass spectrometry device with atmospheric pressure interface
  • Mass spectrometry method and mass spectrometry device with atmospheric pressure interface

Examples

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Embodiment 1

[0064] Such as figure 1 As shown, the present invention provides a specific embodiment based on the above-mentioned principle, method and positive and negative ion separation device.

[0065] The mass spectrometry device provided in this embodiment with an atmospheric pressure interface includes an atmospheric pressure ion source 100, the atmospheric pressure ion source 100 is connected with a positive and negative ion separation device, and the positive and negative ion separation device includes a vacuum chamber 101, which includes a positive ion capture The device 102 is used for trapping positive ions, and the negative ion trap 105 is used for trapping negative ions. The positive ion trap 102 is connected to the first mass analyzer 104 through the positive ion transport channel 103 ; the negative ion trap 105 is connected to the second mass analyzer 107 through the negative ion transport channel 106 . The positive ion transport channel 103 and the negative ion transport c...

Embodiment 2

[0071] Such as figure 2 As shown, this embodiment provides a second mass spectrometry device with an atmospheric pressure interface. The difference between this device and Embodiment 1 is:

[0072] First, in this embodiment, only one mass analyzer 204 is used, and the mass analyzer 204 is connected with an ion deflector 210, and the positive ion transport channel 203, the negative ion transport channel 206 and the ion source 208 of unionized substances are all connected to the on the ion deflector 210 .

[0073] Second, in this embodiment, the structures of the positive ion transport channel 203 and the negative ion transport channel 206 are divided into three sections. Taking the positive ion transport channel 203 as an example, it includes a first positive ion transport channel 31 which is connected to the positive ion trap. Connect the second positive ion transport channel 32 at the end of the first positive ion transport channel 31, the second positive ion transport ch...

Embodiment 3

[0076] Such as image 3As shown, the difference between this embodiment and Embodiment 1 is that the positive ion transport channel and the negative ion transport channel are not included in the vacuum chamber, and the positive ions and negative ions separated by the positive and negative ion separation device directly hit the inner wall of the vacuum chamber , or be pumped out by the vacuum pump used to extract the vacuum cavity. However, the unionized substance ion source 308 and a mass analyzer 304 connected thereto still remain in the vacuum cavity. This configuration is designed for situations where only neutral species released from atmospheric pressure ion sources need to be analyzed. In this case, there is no need to analyze the positive and negative ions released by the atmospheric pressure ion source. The function of the positive and negative ion separation device is to separate the neutral substances released by the atmospheric pressure ion source from the positive...

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Abstract

The invention discloses a mass spectrometry method comprising the steps that positive ions and negative ions which are released by an ion source are received; and the positive ions and the negative ions are separated and introduced into different ion transportation channels and fed into a mass analyzer through different ion transportation channels. The invention provides another mass spectrometry method comprising the steps that the positive ions, the negative ions and unionized material which are released by the ion source are received; the positive ions and the negative ions are separated; and the unionized material is ionized and then fed into the mass analyzer, wherein the positive ions, the negative ions and the unionized material are generated under atmospheric pressure. The invention also provides a mass spectrometry device with an atmospheric pressure interface based on the method.

Description

technical field [0001] The invention relates to the field of mass spectrometry, in particular to a mass spectrometry method and a mass spectrometry device with an atmospheric pressure interface. Background technique [0002] The mass analyzer of the mass spectrometer works in a high vacuum environment. With the emergence of ion sources under various atmospheric pressure environments, it is necessary to transmit ions generated under atmospheric pressure to the mass analyzer in a high vacuum environment. To address this need, atmospheric pressure interface devices have been developed that transport ions between atmospheric and vacuum environments. The atmospheric pressure interface device is installed at one end of the vacuum chamber and has a small channel (which can be a small hole or a small tube). One side of the small channel faces the atmospheric pressure environment and is used to receive ions generated from the atmospheric pressure ion source; the other side faces the ...

Claims

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Application Information

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IPC IPC(8): H01J49/04H01J49/26
CPCH01J49/0095H01J49/0422H01J49/26
Inventor 江游方向熊行创黄泽建
Owner NAT INST OF METROLOGY CHINA
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