VUV lamp ionization source device for continuous on-line monitoring of mass spectrometry
An ionization source and mass spectrometry technology, applied in the field of VUV lamp ionization source device, can solve the problems of reducing ionization efficiency and the like
Inactive Publication Date: 2019-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
However, the ionization efficiency of the VUV lamp is related to the ionization energy and ionization cross section of the substance. For compounds with ionization energy higher than 10.0ev and smaller ionization cross section, the ionization efficiency will be greatly reduced
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[0022] see figure 1 , is a structural representation of the present invention.
[0023] A VUV lamp ionization source device for continuous on-line monitoring of mass spectrometry, comprising a VUV lamp 1, a sealed ionization source cavity 2, a through hole is opened on the side wall of the ionization source cavity 2, and the through hole passes through a baffle valve 10 and a vacuum pump 9 connections, a vacuum gauge 8 for measuring the vacuum in the cavity is provided on the side wall of the ionization source cavity 2; it is characterized in that:
[0024] An ion outlet is provided on the wall of the ionization source chamber 2, and a Skimmer electrode 6 is provided outside the ionization source chamber 2 near the ion outlet;
[0025] The light outlet of the VUV lamp 1 is placed inside the ionization source cavity 2, and the light emitted by the VUV lamp 1 passes through the electrode group 11, the ion outlet and the Skimmer electrode 6 in sequence;
[0026] The electrode g...
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Abstract
The invention relates to a mass spectrum analyzer and particularly relates to a VUV lamp ionization source device for the continuous on-line monitoring of mass spectrometry. The specific structure ofthe device comprises a VUV lamp, an ionization source chamber, a baffle valve, a vacuum gauge and a vacuum pump. A sample molecular sample injection tube, an electrode group, a polytetrafluoroethyleneinsulated ring group and a Skimmer electrode are arranged in the emission direction of the VUV lamp in the ionization source chamber, all electrodes are flat plate structures with intermediate circular holes and are parallelly and coaxially placed in an insulating way. According to the ionization source device, with a low-pressure charge transfer reaction as a mechanism, the ultraviolet light generated by the VUV lamp collide sample molecules to cause a charge transfer reaction and the sample molecules are separated. According to the new ionization source device technology, the efficiency ofthe continuous online ionization of materials which are difficult to ionize by the VUV lamp is improved greatly, and the device has broad application prospects in the fields of environmental monitoring, food safety, medical diagnosis and the like.
Description
technical field [0001] The invention relates to a mass spectrometry analysis instrument, in particular to a VUV lamp ionization source device for continuous on-line monitoring of mass spectrometry. The ionization source device uses a low-pressure charge transfer reaction as the mechanism, specifically, the sample molecules undergo a charge transfer reaction with ultraviolet light irradiated by a VUV lamp to obtain ionization. The new ionization source device technology greatly improves the ionization efficiency of the VUV lamp continuous on-line ionization of difficult-to-ionize substances. This technology has very broad application prospects in environmental analysis, medical diagnosis and other fields. Background technique [0002] The VUV lamp ionization source device has the advantages of small size, low power consumption, high sensitivity, long life, and simple spectrum. It is suitable for complex sample analysis and continuous online monitoring of samples, process mon...
Claims
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Login to View More IPC IPC(8): H01J49/16
Inventor 李海洋李函蔚侯可勇蒋吉春王艳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI