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Vacuum ultraviolet lamp ionization device

A vacuum ultraviolet lamp and ionization chamber technology, applied in the field of mass spectrometry ionization sources, can solve problems such as increased cost and complex technology, and achieve the effects of enhanced collision probability, broad application prospects, and low power consumption

Active Publication Date: 2011-06-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Vacuum ultraviolet lamp ionization device
  • Vacuum ultraviolet lamp ionization device
  • Vacuum ultraviolet lamp ionization device

Examples

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Embodiment Construction

[0030] 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,

[0031] A permanent magnet focus ring 5 is arranged at a distance of 30 mm directly below the repeller plate 3, the permanent magnet 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;

[0032] A small hole plate 7 is provided at 1 mm directly below the permanent magnet focus ring 5, the small hole 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;

[0033] There are three coaxial lenses 8 at 1 mm directly below the small hole plate 7, which are coaxial with the repelling plate 3;

[0034] Between the permanent magnet focus ring 5, the...

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Abstract

The invention discloses a vacuum ultraviolet lamp ionization device, which comprises an ionization chamber, an ultraviolet lamp, a repulsion plate, a permanent-magnet focusing ring, a small-hole plate, a capillary sample injector and a lens system. An ionization source in the vacuum ultraviolet lamp ionization device has two working modes: an ultraviolet ionization mode and an ultraviolet and electron collision ionization mode, which can be converted by voltage regulation. An electron moves helically under the action of the permanent-magnet focusing ring on the electron, thereby increasing a probability of electron collision and improving the detection sensitivity of the electron collision ionization mode. The vacuum ultraviolet lamp ionization device is characterized by wide range of a sample to be detected, high sensitivity, low energy consumption, long service life, wide range of a working pressure and the like, and has a wide application prospect in process monitoring and environmental on-line analysis.

Description

technical field [0001] The invention relates to a mass spectrometer ionization source. A permanent magnet focusing ring is designed in the ionization process to improve ion transmission efficiency; 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 s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/16
Inventor 李海洋吴庆浩侯可勇花磊陈平崔华鹏
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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