Mass spectrometer

Abstract

The invention discloses a mass spectrometer. The mass spectrometer comprises a cavity structure, an air pressure adjustment apparatus, a vacuumizing apparatus and an ion detector, wherein the cavity structure defines a vacuum cavity with a sample inlet; a first ion trap and a second ion trap in the vacuum cavity form mutually connected ion channels; the inlet ends of the ion channels are oppositeto the sample inlet; a first electrode is arranged at the front end of the first ion trap; a second electrode is arranged at the back end of the second ion trap; a third electrode is arranged betweenthe first ion trap and the second ion trap; the air pressure adjustment apparatus is arranged on the cavity structure and used for adjusting the air pressure value in the vacuum cavity; the vacuumizing apparatus is arranged on the cavity structure and used for performing vacuumizing in the vacuum cavity; and the ion detector is arranged in the vacuum cavity and used for performing quality analysison ions in the ion channels. According to the mass spectrometer provided by the embodiment of the invention, the air pressure adjustment apparatus used for adjusting the air pressure in the vacuum cavity is arranged on the cavity structure, so that the air pressure in the vacuum cavity can be kept within a certain range, thereby improving ion axial transmission efficiency.

Description

technical field [0001] The invention relates to the technical field of mass spectrometer analysis, in particular to a mass spectrometer. Background technique [0002] Mass spectrometers are divided into many different types according to their mass analyzers, and each mass analyzer has different characteristics; the more commonly used mass analyzers now include quadrupole mass analyzers (Quadrupole Analyzers), three-dimensional ion Trap mass analyzers (3D Ion Trap Analyzers), linear ion trap mass analyzers (Linear IonTrap Analyzers), electrostatic field ion trap mass analyzers (Orbitrap Analyzers), time-of-flight mass analyzers (TOF Analyzers), Fourier transform ion Cyclotron resonance mass analyzer (FTICR Analyzers) and other types. [0003] Nowadays, many mass spectrometers combine multiple mass analyzers. Using the analysis advantages of different mass analyzers can further improve the analytical performance of combined mass spectrometers. The more common combined mass sp...

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Problems solved by technology

[0005] However, since a large number of air molecules enter the vacuum cavity after opening the injection port, the air pressure inside the vacuum cavity will rise rapidly. The unstable air pressure inside the bulk structure reduces the transmission efficiency of ions and affects the experimental results

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