A suitable ion source for time-of-flight mass spectrometer

Abstract

The invention discloses an ion source suitable for a flight time mass spectrometer, which relates to an ion source for a mass spectrometer. The ion source is provided with a sample introduction booster pump, a solenoid valve, a repulsion electrode, an ionization chamber, a middle grid, an extraction grid, a focusing electrode, an emergent pole piece and an excitation source generator, wherein theoutlet of the sample introduction booster pump is communicated with the inlet of the solenoid valve; the outlet of the solenoid valve is communicated with the inlet of the repulsion electrode; the repulsion electrode is arranged in the inlet end of the ionization chamber; the middle grid is arranged at the outlet end of the ionization chamber; the extraction grid is arranged at the side of the middle grid; the focusing electrode and the emergent pole piece are successively arranged at the side of the extraction grid; the focusing electrode and the emergent pole piece are both provided with a central ion extraction through hole; the ionization chamber, the repulsion electrode, the middle grid, the extraction grid, the focusing electrode and the emergent pole piece are coaxial; a filament is arranged out of the upper end and the lower end of the ionization chamber; and the excitation source generator faces to an energy beam incidence hole arranged on the ionization chamber. According tothe ion source, a pulse ion group can be generated, the ion extraction efficiency is greatly improved, the ion use ratio is improved, and the sensitivity of the mass spectrometer is improved.

Description

Technical field [0001] The invention relates to an ion source of a mass spectrometer, in particular to an ion source and extraction device of a time-of-flight mass spectrometer. Background technique [0002] The mass spectrometer is one of the most important members in the field of modern scientific analytical instruments, and one of the most advanced means of modern analytical science. The mass spectrometer is a modern precision analytical instrument that first ionizes the sample, and then passes through a preset electric or magnetic field to achieve mass-to-charge ratio separation, and detects the corresponding peak intensity, so as to achieve qualitative and quantitative analysis of the sample. From the initial isotope analysis, mass spectrometry has gradually become an indispensable analysis and detection method in many aspects such as chemistry, geology, biochemistry, pharmacology, medicine, petrochemical industry, energy, environmental protection and food processing. [0003...

AI Technical Summary

Problems solved by technology

If the ion source delivers a continuous ion flow, it will cause the ions to enter the time-of-flight mass spectrometer only when there is a pulse voltage, so the utilization rate of the ions is very low (<10%), and the sensitivity of the instrument is also affected. Great constraints

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