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Ionization device of vacuum UV lamp

A vacuum ultraviolet lamp and ionization chamber technology, applied in the field of mass spectrometry ionization sources, can solve the problems of increased cost and complex technology, and achieve the effects of wide range, broad application prospects and high sensitivity

Inactive Publication Date: 2010-06-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
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Problems solved by technology

This solution has strict requirements on air pressure, power consumption and service life, and the technology in the integration process is complex, resulting in a significant increase in cost

Method used

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  • Ionization device of vacuum UV lamp
  • Ionization device of vacuum UV lamp
  • Ionization device of vacuum UV lamp

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Embodiment Construction

[0029] Such as figure 1 As shown, a vacuum ultraviolet lamp ionization device includes an ionization chamber 2, a vacuum ultraviolet lamp 1 as an ionization source is installed above the ionization chamber 2, and a repelling plate is arranged at 1-4 mm below the window of the vacuum ultraviolet lamp 1 3,

[0030] A focus ring 5 is provided at a distance of 30 mm directly below the repeller plate 3, the focus ring 5 is a circular plate with a hole in the middle, the aperture is 6 mm, and is coaxial with the repeller plate 3;

[0031] A small orifice plate 7 is provided at 1 mm directly below the focusing ring 5, the small orifice plate 7 is a circular plate with a hole in the middle, the aperture is 1 mm, and is coaxial with the repelling plate 3;

[0032] There are three coaxial lenses 8 at 1 mm directly below the small hole plate 7, which are coaxial with the repelling plate 3;

[0033] Between the focus ring 5, the small hole plate 7 and the lens 8, a 1mm thick insulating...

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Abstract

The invention relates to an ionization device of a vacuum UV lamp, comprising an ionization chamber, a UV lamp, a repulsion plate, a focusing ring, a small hole plate, a capillary sampling system and a lens system. The design of the focusing ring can increase about 2 orders of magnitude of signal strength. An ionization source in the ionization device has two working modes, namely a UV light ionization mode and a UV light and electron impact ionization mode, and the two modes can be converted by voltage regulation. The ionization device of the vacuum UV lamp has the characteristics of wide of range of sample to be detected, high sensitivity, low power consumption, long life, wide range of working air pressure, and the like, and has wide application prospects in process monitoring and real-time online analysis of organic pollutants.

Description

technical field [0001] The invention relates to a mass spectrometer ionization source, in which a focusing ring is designed to improve ion transmission efficiency during the ionization process; this technology not only improves the ionization transmission efficiency, but also realizes the switching between ultraviolet light and electron impact ionization mode and ultraviolet photoionization mode. Background technique [0002] The vacuum ultraviolet lamp ionization source has the advantages of small size, low power consumption, high sensitivity, long life, and simple spectrum. It is suitable for complex sample analysis, online monitoring of samples, process monitoring and other fields. However, compared with the electron impact ionization source, the vacuum ultraviolet lamp ionization source requires the ionization energy of the ionized sample to be lower than its photoelectron energy, and the fragment information of the compound is less, so it is difficult to obtain the struc...

Claims

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Application Information

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IPC IPC(8): H01J49/10H01J29/26
Inventor 吴庆浩李海洋侯可勇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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