Mass spectrum analyzer and analyzing method thereof

A mass spectrometer and a series of technologies, applied in the field of mass analysis in analytical instruments, can solve problems such as not easy to distribute evenly, and achieve the effects of preventing ion diffusion and escape, increasing the frequency of mirror current signals, and improving quality

Inactive Publication Date: 2013-03-27
上海斯善质谱仪器有限公司
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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 m...

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  • Mass spectrum analyzer and analyzing method thereof
  • Mass spectrum analyzer and analyzing method thereof
  • Mass spectrum analyzer and analyzing method thereof

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with accompanying drawing, and the structure and principle of this device and method are very clear to those skilled in the art. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035]The inventors found that if the ion orbital radius is excited by the cyclotron resonance method, it is necessary to provide a uniform high-intensity magnetic field distribution on the entire cross-section of the working chamber. However, in the image current acquisition stage after the ions are excited, the ions only move on the orbit with a larger radius, and the movement frequency has nothing to do with the magnetic field in the central region with a smaller radius. The present invention proposes an analysis method of magnetic cyclotron mass spectrometry, which includes the use of a magnetic field generation method ...

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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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Application Information

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IPC IPC(8): H01J49/42H01J49/20
Inventor 丁贤忠
Owner 上海斯善质谱仪器有限公司
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