Photoelectron and ion image spectroscopy device based on liquid beam injection

Abstract

The invention discloses a photoelectron and ion image energy spectrum device based on liquid beam sample injection. The device comprises a vacuum cavity, a liquid beam sample injection device, a vacuum pump set, a liquid nitrogen cold trap pump and an image energy spectrometer system, and the image energy spectrometer system comprises an imaging electrode, a differential pumping system and an image detector system. The imaging electrode and differential pumping system comprises a repelling polar plate, a leading-out polar plate and a differential polar plate which are sequentially distributedin the vacuum cavity; and the liquid beam sample injection device comprises a nozzle, the nozzle is located between the repelling polar plate and the leading-out polar plate, the vacuum pump set and the liquid nitrogen cold trap pump are arranged on the vacuum cavity, the laser ionization source enters the vacuum cavity, and a laser focus acts on an outlet of the nozzle. Kinetic energy distribution of photoelectrons of a solution phase can be obtained, angle distribution information of the photoelectrons of the solution phase can be obtained at the same time, and the photoelectron or ion imagedetection device of the solution phase considering the solvation effect is a novel photoelectron or ion image detection device of the solution phase in the true sense.

Description

technical field [0001] The invention relates to the field of liquid phase mass spectrometry analysis, in particular to a photoelectron and ion imaging energy spectrometer device based on liquid beam sampling. Background technique [0002] Mass spectrometry is mainly a method of qualitative and quantitative analysis of samples through the analysis of the mass-to-charge ratio of ions in the sample. It is widely used in environmental pollution monitoring, food safety testing, mineral composition analysis, life and medicine. detection and other fields. A mass spectrometer generally includes an ion source, a mass analyzer, a detector, and a vacuum system. The ion source device ionizes the sample into ions, the mass analyzer separates the ions with different mass-to-charge ratios, and the detector detects the separated ions to obtain the mass spectrum of the sample. At present, the commonly used imaging spectrometer system is widely used in the above fields because of its high s...

AI Technical Summary

Problems solved by technology

For example, the biomolecular mass spectrometry analysis method based on electrospray ionization or matrix assisted laser desorption ionization technology essentially relies on gas-phase spray ionization or ionization, although it can be used for Protein analysis provides a new and accurate and fast way, but it is not a pure solution-phase vacuum mass spectrometry study in the true sense, and cannot truly consider the solvation effect of the solvent environment on sample molecules

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