Normal pressure micro glow discharge desorption mass spectrum ion source based on magnetic field constraint and mass spectrometer

Abstract

The invention discloses a normal pressure micro glow discharge desorption mass spectrum ion source based on magnetic field constraint. The normal pressure micro glow discharge desorption mass spectrum ion source based on magnetic field constraint comprises an ion source body used for generating normal pressure micro glow discharge, a Helmholtz coil used for providing a uniform magnetic field for restraining a micro glow discharge plasma and a sample ion, and an annular electrode used for generating a static electric field to assist in focusing charged particles, wherein the ion source body is located in the magnetic field generated by the Helmholtz coil, and ion current generated by the ion source body passes an electric field generated by the annular electrode. The invention further discloses a mass spectrometer adopting the normal pressure micro glow discharge desorption mass spectrum ion source based on magnetic field constraint. The normal pressure micro glow discharge desorption mass spectrum ion source based on magnetic field constraint and the mass spectrometer are low in energy consumption, small and exquisite in appearance, simple in structure and easy and convenient to operate, have little influence on the outside, are high in signal enhancement degree, are free of sample pretreatment, carry out analysis quickly, can reach the purpose of harmless analysis, and are clean and free of pollution.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a magnetic field-confined atmospheric pressure microglow discharge desorption mass spectrometry ion source and a mass spectrometer analyzer. Background technique [0002] Mass spectrometry is a method of mass spectrometry by measuring the mass-to-charge ratio of the measured sample ions. As an important detection tool in analytical science, mass spectrometer has the advantages of high sensitivity, fast analysis speed, good selectivity, and can be used in chemometrics. It is widely used in chemistry, chemical industry, materials, environment, geology, energy, medicine, Criminal investigation, life science, sports medicine and other fields, and it plays a huge role in the qualitative and quantitative analysis of trace analytes. For a long time, people have been committed to improving the analytical performance of mass spectrometers, and the improvement of this performance mainly...

AI Technical Summary

Problems solved by technology

These technologies play an important role in various fields, but in the normal pressure environment, the sample ions are susceptible to external interference, which greatly reduces the ion transmission efficiency, which greatly limits the sensitivity of normal pressure mass spectrometry analysis.

At the same time, this type of atmospheric ion source requires a high energy source, high heat complicates the mass spectrogram, the structure of the ion source is complex, and the production cost is high, so it needs further improvement and improvement

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