Transmission device for transmitting ions in proton transfer reaction ion source

A technology of proton transfer reaction and transmission device, which is applied in particle separation tubes, parts of particle separator tubes, sample introduction/extraction, etc. System sensitivity, reducing the noise floor, improving the effect of signal-to-noise ratio

Pending Publication Date: 2017-09-29
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, GC-MS involves chromatographic separation technology and sample collection, concentration and extraction, resulting in time-consuming and laborious measurement, and is not suitable for on-site and real-time online analysis; in addition, the electron bombardment ionization source used in this combined technology is a Hard ionization technology will not only form a variety of ion fragments, making the mass spectrum complex and difficult to analyze, but also ionize the conventional components in the air such as N2, O2, CO2 and Ar, which will interfere with the real-time analysis of small molecular weight volatile organic compounds. detection

Method used

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  • Transmission device for transmitting ions in proton transfer reaction ion source
  • Transmission device for transmitting ions in proton transfer reaction ion source
  • Transmission device for transmitting ions in proton transfer reaction ion source

Examples

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Embodiment 1

[0027] Such as figure 1 As shown, the transmission device disclosed in this embodiment for transmitting ions in the proton transfer reaction ion source includes a coaxially arranged ring-shaped transmission focusing electrode 3, an inlet electrode 5 and an extraction electrode 7, and the ring-shaped transmission focusing electrode 3 is located at the inlet Between the electrode 5 and the extraction electrode 7, the center of the introduction electrode 5 is provided with an ion introduction port, and the center of the extraction electrode 7 is provided with an ion extraction port; the center of the annular transmission focusing electrode 3 has a funnel-shaped ion focusing transmission channel, and the end of the ion focusing transmission channel Facing the ion extraction port, the ion introduction port, the ion transmission channel, and the ion extraction port are connected, and a jet blocking electrode 6 is arranged in the ion transmission channel. The ions from the proton tra...

Embodiment 2

[0033] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that an insulating spacer 13 is provided between two adjacent pole piece rings to provide a dielectric, and the material of the insulating spacer 13 is preferably tetrafluoroethylene. Preferably, the pole piece ring is circular, the material of the pole piece ring is stainless steel, and the thickness of the pole piece ring is 1 mm. Two sets of sinusoidal radio frequency low-voltage voltages with a phase difference of 180° are applied to adjacent pole piece rings. There are 3-1000 pole piece rings, the inner diameter of the pole piece ring is 0.1mm-100mm, and the inner diameter of the front pole piece ring is 0.1 -100mm, the inner diameter of the pole piece ring at the rear end is 0.1-100mm, the diameter of the ion introduction port is 100mm, and the diameter of the ion extraction port is 1mm. The ion introduction electrode 5 is made of a stainless steel sheet with a thickness of 2 m...

Embodiment 3

[0037] Such as image 3 As shown, the difference between this embodiment and embodiment 1 or embodiment 2 is: image 3 It is a quarter sectional view of the transmission device including the vacuum chamber. The transmission device is wrapped by an aluminum alloy vacuum chamber 1 to provide a closed environment. The interior of the transmission device is connected to the vacuum obtaining device through the vacuum suction port 2 to obtain a vacuum chamber In the vacuum state in the body 1, the working pressure of the transmission device is 1Pa; the vacuum suction port 2 also provides a conduction position for the DC and AC voltage required by the transmission device.

[0038] The other end of the fixing screw 12 is fixed on the base of the mass analyzer interface 9, and the ion extraction port is connected with the mass analyzer interface 9, and acts as a vacuum barrier. The entire ion transmission device is connected to the quadrupole mass analyzer through the mass analyzer in...

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PUM

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Abstract

The invention relates to a transmission device for transmitting ions in a proton transfer reaction ion source. The transmission device comprises an annular transmission focusing electrode, an introducing electrode and an extracting electrode which are coaxially arranged, wherein the annular transmission focusing electrode is positioned between the introducing electrode and the extracting electrode, an ion introducing port is formed in the center of the introducing electrode, and an ion extracting port is formed in the center of the introducing electrode; the center of the annular transmission focusing electrode is provided with a funnel-shaped ion focusing transmission passage, the tail end of the ion focusing transmission passage faces the ion extracting port, the ion introducing port, the ion transmission passage and the ion extracting port are communicated, and the ion transmission passage is internally provided with a jet flow blocking electrode. According to the transmission device, the ion utilization efficiency of the proton transfer reaction mass spectrum ion source can be improved, the problem that the transmission efficiency of an existing ion transmission method is insufficient is solved, and finally the sensitivity of a proton transfer reaction mass spectrometer is improved.

Description

technical field [0001] The invention and the field of proton transfer reaction mass spectrometry particularly relate to a transmission device for transmitting ions in a proton transfer reaction ion source. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, VOCs) are the main pollutants in the atmosphere, water and soil environment, and long-term ingestion will cause the risk of carcinogenesis, teratogenicity and mutagenesis. In addition, volatile organic compounds in the air will also participate in photochemical reactions, leading to adverse changes in the climate, such as photochemical smog, organic aerosols, and the emergence of the greenhouse effect. In addition, food also contains a large amount of volatile organic compounds. By analyzing the volatile compounds in food, the composition and quality of food can be monitored to ensure food safety. Volatile organic compounds are also important components in the exhaled air of the human bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/00H01J49/04
CPCH01J49/0072H01J49/0422
Inventor 赵忠俊段忆翔
Owner SICHUAN UNIV
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