Mass spectrum analyzer and analyzing method thereof

Abstract

The invention relates to the technical field of mass analysis of analytical instruments, in particular to a mass spectrum analyzer and an analyzing method thereof. The mass spectrum analyzer comprises a magnetic field generating device, a vacuum system, an ion source, an ion accelerator and a series of electrodes. The magnetic field generating device is used for forming a high-strength magnetic field in annular space, an annular axle line exists in the annular space, and magnetic lines of the high-strength magnetic field and the axle line are orthogonal; the vacuum system is used for forming ultrahigh vacuum in the annular space; the ion source is used for generating analyzed ions; the ion accelerator accelerates the analyzed ions which enter an ion annular motion track basically along the axle line and sustain circumnutation for a while; at least parts of the electrodes arranged around the annular axle line are used for detecting image charges induced on the ions in a circumnutation process. According to the mass spectrum analyzer and the analyzing method thereof, the image current signal frequency is improved effectively, the limit electrodes can prevent ions from being diffused and escaping, the magnetic field distribution is even, the mass spectrum quality is improved effectively, and the market prospect is good.

Description

[technical field] [0001] The invention relates to the technical field of mass analysis in analytical instruments, in particular to a mass spectrometer and an analysis method thereof. [Background technique] [0002] Mass spectrometer, also known as mass spectrometer, is an instrument used to separate and detect different chemical or biological components. It separates and detects according to the mass difference of material atoms, molecules or molecular fragments according to the difference in the state and result of the movement of charged particles in an electromagnetic field. A type of instrument that detects the composition of substances. Magnetic mass spectrometer is a kind of mass spectrometer, which has experienced a long history of development. From the traditional magnetic deflection mass spectrometer and magnetic cyclotron mass spectrometer to the modern Fourier transform magnetic cyclotron resonance mass spectrometer (FTICR), they all use the movement of charged i...

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Problems solved by technology

In the article Characterization of a small FTICR mass spectrometer based on a permanent magnet by L C Zeller et al. (Anal. Chem., 1993, 65 (15), pp 2116–2118), it is proposed to use a permanent magnet to generate a magnetic field for cyclotron resonance mass spectrometry However, it is not easy to generate a uniform strong magnetic field on a cross-section with a diameter of more than 50mm. Not only the total magnetic flux exceeds the amount that a general magnet can provide, but it is also not easy to distribute evenly on the entire cross-section. Therefore, the permanent magnetic cyclotron resonance mass spectrometer has no Can get rapid development

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