Ion source of proton transfer mass spectrometer

A proton transfer and ion source technology, which is applied in the field of mass spectrometry ionization source devices to achieve the effects of improving repulsion and extraction efficiency, improving ion transmission efficiency, and high production efficiency

Active Publication Date: 2012-09-19
KUSN HEXIN MASS PECTRUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are currently no reports on the application of ion funnels in proton transfer mass spectrometry

Method used

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  • Ion source of proton transfer mass spectrometer
  • Ion source of proton transfer mass spectrometer
  • Ion source of proton transfer mass spectrometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1, see figure 1 Shown:

[0024] A proton transfer mass spectrometry ion source of the present invention comprises an insulating medium cavity 1, a repeller electrode 2, a gas inlet 3, a radio frequency coil 4, an extraction electrode 5, a sample inlet 6 and an ion funnel type drift tube 7, the insulating medium cavity 1. The upper end is closed, the lower end is open, and connected to the lead-out electrode 5; the radio frequency coil 4 surrounds the middle part of the insulating medium cavity 1; the gas inlet 3 is provided between the radio frequency coil 4 and the closed end of the insulating medium cavity 1 The repelling electrode 2 is located inside the closed end of the insulating medium cavity 1, and is located above the radio frequency coil 4; the insulating medium cavity 1 is inserted into the inside of the upper end of the ion funnel drift tube 7 and sealed The sample inlet 6 is located on the upper side wall of the ion funnel drift tube 7, and is loca...

Embodiment 2

[0027] Example 2, see figure 2 Shown:

[0028] A proton transfer mass spectrometry ion source of the present invention comprises an insulating medium cavity 1, a repeller electrode 2, a gas inlet 3, a radio frequency coil 4, an extraction electrode 5, a sample inlet 6 and an ion funnel type drift tube 7, the insulating medium cavity 1. The upper end is closed, and the lower end is open and connected to the lead-out electrode 5; the radio frequency coil 4 surrounds the middle part of the insulating medium cavity 1; the gas inlet 3 is arranged between the radio frequency coil 4 and the closed end of the insulating medium cavity 1 on the side wall; the repelling electrode 2 is located inside the closed end of the insulating medium cavity 1, and is located above the radio frequency coil 4; the insulating medium cavity 1 is inserted into the inside of the upper end of the ion funnel drift tube 7 and sealed; The sample inlet 6 is located on the upper side wall of the ion funnel dr...

Embodiment 3

[0031] Example 3, see figure 1 Shown:

[0032]The structure of this embodiment is basically the same as that of Embodiment 1. The material of the insulating medium chamber 1 is glass, the inner diameter is 2mm, the length is 20mm, the gas pressure in the chamber is 200Pa, the carrier gas is nitrogen, and the gas flow rate is 1mL / min. The repeller electrode 2 is a needle-shaped electrode. When positive ions are detected, a positive voltage of 1000V is applied to the electrode, and when negative ions are detected, a corresponding negative voltage of -1000V is applied. The lead-out electrode 5 is a plate electrode with holes, and the hole diameter is 0.1 mm. A negative pressure of 200 Pa is maintained in the ion funnel drift tube 7 by a vacuum pump.

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PUM

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Abstract

The invention relates to the technical field of a mass spectrometer ionization device, and particularly relates to an ion source of a proton transfer mass spectrometer, which comprises an insulating medium cavity, a repulsion electrode, a gas inlet, a radio frequency coil, a leading-out electrode, an injection port and an ion funnel type drift tube, wherein the upper end of the insulating medium cavity is sealed, the lower end of the insulating medium cavity is opened, and the opened end is connected with the leading-out electrode; the radio frequency coil surrounds at the periphery of the middle of the insulating medium cavity; the repulsion electrode is arranged inside the sealed end of the insulating medium cavity; the insulating medium cavity is inserted into the upper end of the ion funnel type drift tube and sealed; and the central axis of the insulating medium cavity is coaxial with the central axis of the leading-out electrode. According to the ion source of the proton transfer mass spectrometer, the ionization efficiency, the ion transmission efficiency and leading-out efficiency of an ionization source are improved, so that the sensitivity of the mass spectrometer is improved.

Description

technical field [0001] The invention relates to the technical field of mass spectrometry ionization source devices, in particular to a proton transfer mass spectrometry ion source. Background technique [0002] Mass spectrometry is an analysis method that first ionizes substances, separates them according to the mass-to-charge ratio of ions, and then measures the intensity of various ion spectrum peaks to achieve the purpose of analysis. The ion source is one of the most important components of a mass spectrometer. Its function is to ionize the analyzed substance into ions and converge the ions into an ion beam with a certain energy and a certain geometry. [0003] Ionization methods in mass spectrometry mainly include electron ionization, electrospray ionization, matrix-assisted laser ionization, photoionization, plasma extraction and other methods. Among them, the plasma extraction method is to apply a certain electric field in the formed plasma to extract electrons or ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/14
Inventor 吴庆浩程平黄正旭高伟董俊国周振傅忠
Owner KUSN HEXIN MASS PECTRUM TECH
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