Photoionization ion source with compact structure and photoionization time-of-flight mass spectrometer
A time-of-flight mass spectrometry technology with a compact structure, applied in the field of analytical instruments, can solve the problems of unfavorable popularization and application, complex instrument structure, high energy consumption, etc., and achieve the effects of reducing costs, improving ion transmission efficiency, and reducing difficulty
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Embodiment 1
[0028] Embodiment 1 A kind of compact photoionization ion source
[0029] This embodiment provides a compact photoionization ion source, such as figure 1 As shown, it includes an ultraviolet lamp 2 and an electrode group, an insulating sealing ring 4 is arranged between adjacent electrodes in the electrode group, the electrodes in the electrode group are made of stainless steel or other metals, and the insulating sealing ring is made of tetrafluoroethylene or other non-metallic materials. The middle parts of the electrodes in the electrode group are all provided with a through-hole structure, and the insulating sealing ring 4 and the electrodes in the electrode group together form a columnar cavity, which is the ionization region of the sample. The ultraviolet lamp 2 is arranged at one end of the cylindrical cavity close to the drifting first electrode 3 . The contact parts of the components constituting the columnar cavity are air-tight so as to maintain the vacuum degree. ...
Embodiment 2
[0036] Embodiment 2 A kind of photoionization time-of-flight mass spectrometer
[0037]This embodiment provides a photoionization time-of-flight mass spectrometer, the ion source of which is the photoionization ion source of Embodiment 1. The photoionization ion source is connected with devices such as an ion lens and a time-of-flight mass analyzer at the rear end through a vacuum chamber 10 in the ion transmission region. In this embodiment, devices whose structures are not specified, such as ion lenses and time-of-flight mass analyzers, belong to the prior art.
[0038] An ion transporter 9 is arranged in the vacuum chamber 10 of the ion transport area, and the ion transporter 9 is preferably a quadrupole ion transporter. The rear end of the vacuum chamber 10 in the ion transmission area is provided with a small hole electrode 11 for extracting ion beams, and a small hole with a diameter of 1.5 mm is set on the small hole electrode 11 .
[0039] The vacuum chamber 10 in th...
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