Mass spectrometer, sample ionization platform and ion source thereof

Abstract

The invention relates to a mass spectrometer, a sample ionization platform and an ion source of the sample ionization platform. The mass spectrometer comprises the sample ionization platform and analysis equipment. The sample ionization platform includes a sample holder and an ion source. The ion source comprises a first electrode, an insulating part and a second electrode, a first ionization hole is formed in the first electrode, and the first ionization hole is used for inputting gas and generating initial reaction ions; the insulating part is arranged on one side surface of the first electrode, and a communicating hole is formed in the insulating part; the second electrode is arranged on the side face, opposite to the first electrode, of the insulating part, the polarity of the second electrode is opposite to that of the first electrode, a second ionization hole is formed in the second electrode, the second ionization hole is communicated with the first ionization hole through a communicating hole, and the second ionization hole is used for generating and outputting initial reaction ions; the diameters of the first ionization hole, the communicating hole and the second ionization hole are consistent, and the diameter ranges from 0.01 mm to 1 mm. The ion channel is small in diameter, so that the ion flow is more concentrated, the ionization efficiency is enhanced, and non-initial reaction ions are reduced.

Description

technical field [0001] The invention relates to the technical field of detection instruments, in particular to a mass spectrometer, a sample ionization platform and an ion source thereof. Background technique [0002] The main function of the ion source in the mass spectrometer is to ionize the sample to be tested to form ions. The ions are focused and transmitted into the mass analyzer under the action of an electric field or a magnetic field. composition information. The hollow cathode discharge is a special glow discharge, which produces a high concentration of ions, and the ion current density of the central axis is the largest. Although the ion flow generated by the traditional hollow cathode discharge is stronger than that of the glow discharge, it requires a higher degree of vacuum, and the ion source is prone to pollution. Cleaning and disassembling the ion source requires breaking the vacuum. Moreover, the inner diameter of the traditional hollow cathode discharge...

AI Technical Summary

Problems solved by technology

Although the ion flow produced by the traditional hollow cathode discharge is stronger than that of the glow discharge, it requires a higher degree of vacuum, and the ion source is prone to pollution. Cleaning and disassembling the ion source requires a vacuum breaking operation.

Moreover, the inner diameter of the traditional hollow cathode discharge cathode is large, and it is easy to generate non-initial reaction ions due to gas diffusion into the ion source, which affects the purity of the initial reaction ions.

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