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Mass Spectrometry Method of Ion Trap Mass Spectrometer

An ion trap mass spectrometer, a technology for mass spectrometry, used in instruments, measuring devices, scientific instruments, etc.

Active Publication Date: 2022-04-05
FOCUSED PHOTONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome at least one defect of the mass spectrometry method of the existing ion trap mass spectrometer, and provides a mass spectrometry method of the ion trap mass spectrometer, which ensures that the number of ions in the ion trap is always in an appropriate number when the sample peaks, avoiding The generation of space charge effect

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  • Mass Spectrometry Method of Ion Trap Mass Spectrometer
  • Mass Spectrometry Method of Ion Trap Mass Spectrometer
  • Mass Spectrometry Method of Ion Trap Mass Spectrometer

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Embodiment Construction

[0030] According to some embodiments of the present invention, figure 2 Shown is a schematic flowchart of a mass spectrometry method of an ion trap mass spectrometer according to an embodiment of the present invention. The mass spectrometry method includes a plurality of cycles, each cycle consisting of a pre-scan phase followed by a number of formal scan phases. The mass spectrometry method of ion trap mass spectrometer comprises the following steps:

[0031] First perform a pre-scan, and calculate the pre-scan ionization time t0 according to the formula.

[0032] It is then judged whether the pre-scan ionization time t0 is not less than a preset threshold time T; m formal scans are performed sequentially.

[0033] Among them, if t0≥T is satisfied, the ionization time of multiple formal scans will remain constant at the threshold time T;

[0034] If t0

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Abstract

The invention provides a mass spectrometry method for an ion trap mass spectrometer. According to the actual situation of the concentration of the sample to be tested in the ion trap, the mass spectrometry method dynamically adjusts the ionization time of the subsequent formal scanning stage when the sample to be tested begins to peak and the concentration does not reach the highest point; when the concentration of the sample to be tested is the highest After the point has passed, the ionization time of the subsequent official scan stage is increased by a coefficient; and when the pre-scan ionization time is greater than the threshold time, the ionization time of the subsequent official scan stage is kept constant at the threshold time; multiple cycles The mass spectrometry measurement of multiple cycles is averaged. The number of ions in the ion trap is always in a proper state in each formal scanning stage, and the space charge effect is avoided.

Description

technical field [0001] The invention relates to the technical field of mass spectrometry detection, in particular to a mass spectrometry method for an ion trap mass spectrometer. Background technique [0002] Mass spectrometry plays a pivotal role in the field of modern analysis, and has been widely extended to many fields such as environmental protection, food safety, life science and space exploration. As a modern analytical instrument, mass spectrometer has high detection sensitivity and can effectively detect trace substances. It is a good qualitative and quantitative analysis tool. [0003] The mass analyzer is the core component of the mass spectrometer. According to the different mass analyzers, the mass spectrometer can be divided into magnetic mass spectrometer, Fourier transform-ion cyclotron resonance mass spectrometer, ion trap mass spectrometer, quadrupole mass spectrometer and time-of-flight mass spectrometer. mass spectrometer. Among them, the ion trap mass ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/62G01N30/72
Inventor 段炼马乔刘立鹏韩双来
Owner FOCUSED PHOTONICS