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Linear ion trap composite mass spectrometry system and method for molecular ion reaction

A technology of molecular ion reaction and linear ion trap, which is applied in the field of mass spectrometry, can solve problems such as unfavorable identification of fragment types, complex timing control, and low reaction efficiency, so as to facilitate software transplantation, improve accuracy and reliability, and reduce effect of complexity

Active Publication Date: 2020-05-22
SHANGHAI YUDA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the timing control of the electrical signals required for trapping ions is quite complicated in this method, which is not conducive to distinguishing the types of fragments that actually react and the reaction efficiency is not very high

Method used

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  • Linear ion trap composite mass spectrometry system and method for molecular ion reaction
  • Linear ion trap composite mass spectrometry system and method for molecular ion reaction
  • Linear ion trap composite mass spectrometry system and method for molecular ion reaction

Examples

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no. 1 example

[0044] Such as Figure 8 As shown, two identical vertically connected linear ion trap mass analyzers are included. Among them, 501, 506, 507, and 512 are circular end cap electrodes, and the electrical signals applied to them are DC voltages DC1, DC2, DC3, and DC4 respectively. 502, 503, 504, and 505 are the first linear ion trap mass analyzers The four radio frequency electrodes of the device are triangular in cross section and have slits; 502 and 504 respectively apply radio frequency signals RF1+ and RF1- through the radio frequency power supply RF1, and the two amplitudes are the same and adjustable, and the phase difference is 180°; 503 and 504 The 505 respectively applies small-amplitude sinusoidal AC signals AC1- and AC1+ through the resonant excitation module AC1, which have equal amplitudes and a phase difference of 180°. 508, 509, 510, 511 are the four radio frequency electrodes of the second linear ion trap mass analyzer, the cross section is triangular, and all ha...

no. 2 example

[0047] Such as Figure 9 As shown, there are two identical vertically connected linear ion trap mass analyzers with an ion transport device located between them. Among them, 601, 606, 607, and 612 are circular end cap electrodes, and the electrical signals applied to them are DC voltages DC1, DC2, DC3, and DC4 respectively. 602, 603, 604, and 605 are the first linear ion trap mass analyzers The four RF electrodes of the device are triangular in cross-section and have slits; 602 and 604 apply the amplitude-adjustable RF signal RF1+ through the RF power supply RF1; 603 and 605 apply the amplitude-adjustable RF signal RF1- through the RF power supply RF1, and simultaneously pass the resonance The excitation module AC1 respectively applies small-amplitude sinusoidal AC signals AC1- and AC1+ thereon. RF1+ and RF1- are equal in magnitude to AC1+ and AC1-, with a phase difference of 180°, and AC1+ and AC1- are coupled to RF1- through a bidirectional transformer with a center tap. 6...

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Abstract

The invention provides a linear ion trap composite mass spectrometry analysis system and method for molecular ion reaction, the system comprising two linear ion trap mass analyzers which are identicalor different, wherein the two linear ion trap mass analyzers are arranged perpendicular to each other, and the central axis is located in the same plane; the linear ion trap mass analyzer comprises two sets of identical radio frequency electrodes and a set of end cap electrodes symmetrically arranged on both sides of the radio frequency electrodes, a slit for ion emission is formed in the centerof one group of radio frequency electrodes, and a small hole for ion passage is formed in the center of the end cap electrode, and the small hole is located on the rotational axis of a rotating body formed by two groups of radio frequency electrodes. The system can reduce the influence of the two reactants on each other, better control the fragments or intermediate products that actually react ina certain time sequence, avoid the influence of other fragments or intermediate residues on the experimental results, and control the complexity of the time sequence is low.

Description

technical field [0001] The invention relates to the field of mass spectrometry, in particular to a linear ion trap composite mass spectrometry system and method for molecular ion reactions. Background technique [0002] Mass spectrometry is a fast and efficient analytical method, specifically, it is an analytical method for measuring the mass-to-charge ratio (mass / charge ratio) of ions, which can be used for isotope, compound analysis, gas composition analysis, and metal and non-metallic analysis. Ultrapure trace analysis of metal solid samples, etc. The mass spectrometer used in mass spectrometry is a scientific instrument used to analyze various chemical components, contents and molecular structures in material samples. Commonly used mass spectrometers include magnetic mass spectrometers, quadrupole mass spectrometers, ion trap mass spectrometers, time-of-flight mass spectrometers, Fourier cyclotron resonance mass spectrometers, orbital ion trap mass spectrometers, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J49/00H01J49/02H01J49/42G01N27/62
CPCG01N27/62H01J49/004H01J49/022H01J49/4225
Inventor 何洋肖育徐骏丁正知齐晓军
Owner SHANGHAI YUDA IND
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